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Courses and methods for fastest skills mastery!

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Courses and methods for fastest skills mastery!

Skills without mastery are useless. Mastery is impossible without the right methods. BlitzGrok platform makes mastery effortless and fastest with proven, smart practice.

Grade-2 : Math-2 : 2 : : Two-Step Word Problems

Solve two-step word problems combining addition and subtraction within 100

Two-Step Word Problems

Understanding Multi-Step Problems

Two-step word problems represent a significant leap in mathematical thinking. Unlike one-step problems that require a single operation, two-step problems ask you to perform two calculations in sequence, using the result from the first step to complete the second step. These problems more closely reflect real-world situations where multiple actions occur, making them both more challenging and more useful.

What Makes It a Two-Step Problem?

A two-step word problem requires you to: 1. Perform one mathematical operation (addition or subtraction) 2. Use that result to perform a second operation 3. The answer to step one becomes the starting point for step two

Example: "Carlos had 35 toy cars. He bought 15 more cars, then gave 12 cars to his brother. How many cars does Carlos have now?"

Step 1: Add the cars he bought: 35 + 15 = 50 cars Step 2: Subtract the cars he gave away: 50 - 12 = 38 cars

Notice how the answer from step 1 (50) becomes the starting number for step 2!

Why Two-Step Problems Matter

These problems are important because: - They reflect real life: Most real situations involve multiple steps - They develop logical thinking: You must think through a sequence - They build problem-solving skills: You learn to break complex problems into parts - They prepare you for algebra: Multi-step thinking is foundational for equations - They strengthen perseverance: You learn to work through challenges systematically

Common Types of Two-Step Problems

Type 1: Add-Then-Subtract

Start with an amount, add to it, then take something away.

Structure: Start → Add → Subtract → Final answer

Example: "A store had 42 books. They received 28 more books. Then they sold 15 books. How many books does the store have now?"

Solution: - Step 1: 42 + 28 = 70 books (after receiving more) - Step 2: 70 - 15 = 55 books (after selling some) - Answer: 55 books

Real-Life Context: This happens when you gain something then lose something—getting allowance then spending some, receiving items then giving some away.

Type 2: Subtract-Then-Add

Start with an amount, take something away, then add something back.

Structure: Start → Subtract → Add → Final answer

Example: "Maria had 65 stickers. She gave 20 stickers to her friend. Then she bought 18 more stickers. How many stickers does Maria have now?"

Solution: - Step 1: 65 - 20 = 45 stickers (after giving some away) - Step 2: 45 + 18 = 63 stickers (after buying more) - Answer: 63 stickers

Real-Life Context: This reflects situations where you lose something then gain something—spending money then earning more, using supplies then restocking.

Type 3: Add-Then-Add (Multiple Additions)

Start with an amount, add something, then add something else.

Structure: Start → Add → Add again → Total

Example: "A classroom has 24 students. Then 6 more students join. Later, 5 more students arrive. How many students are in the classroom now?"

Solution: - Step 1: 24 + 6 = 30 students (after first group joins) - Step 2: 30 + 5 = 35 students (after second group arrives) - Answer: 35 students

Real-Life Context: Accumulating things in stages—collecting items over time, adding ingredients in cooking.

Type 4: Subtract-Then-Subtract (Multiple Subtractions)

Start with an amount, take something away, then take more away.

Structure: Start → Subtract → Subtract again → Remaining

Example: "Ahmed had 80 trading cards. He traded away 15 cards in the morning. Then he gave 22 cards to his cousin in the afternoon. How many trading cards does Ahmed have left?"

Solution: - Step 1: 80 - 15 = 65 cards (after morning trade) - Step 2: 65 - 22 = 43 cards (after giving to cousin) - Answer: 43 cards

Real-Life Context: Multiple expenses or losses—spending money twice, losing items at different times.

Type 5: Combined Groups Then Action

Combine two or more groups first, then perform an operation on the total.

Structure: Group 1 + Group 2 → Combined total → Add to or subtract from total

Example: "There are 28 red balloons and 32 blue balloons at a party. Then 15 more balloons are added. How many balloons are there now?"

Solution: - Step 1: 28 + 32 = 60 balloons (red and blue combined) - Step 2: 60 + 15 = 75 balloons (after adding more) - Answer: 75 balloons

The Problem-Solving Process for Two-Step Problems

Follow this systematic approach:

Step 1: Read the Entire Problem

Read all the way through without stopping. Get the big picture of what's happening in the story.

Goal: Understand the overall situation and what's being asked.

Step 2: Identify All the Actions

Look for action words and phrases that indicate what happens in sequence: - "Then..." indicates a second action - "Later..." shows something happens after - "After that..." signals the next step

Example: "First she bought some, then she used some" - Two actions: buying (addition) and using (subtraction)

Step 3: Break It Into Two Parts

Mentally or physically divide the problem: - Part 1: What happens first? - Part 2: What happens next?

Draw a line or use different colors to separate the two parts.

Step 4: Solve Step One

Focus only on the first part: - Identify the numbers involved in step 1 - Determine if you need to add or subtract - Write and solve the equation - This answer becomes your "new starting point"

Step 5: Solve Step Two

Use your answer from step 1: - This is now your starting number for step 2 - Identify what happens next in the story - Determine if you add or subtract - Write and solve the second equation

Step 6: Answer the Question

Make sure your final answer addresses what the problem asks: - Use complete sentences - Include the proper labels (books, dollars, students, etc.) - Check that you answered the right question

Step 7: Check Your Work

Verify your solution makes sense: - Does the sequence of operations match the story? - Is your final answer reasonable? - Did you use the correct operations? - Can you trace your steps backward?

Visual Strategies for Two-Step Problems

Strategy 1: Number Path Diagram

Draw a path showing each step:

Start: 45
   ↓ +20
  65
   ↓ -18
  47 ← Final Answer

This visual shows the journey from start to finish.

Strategy 2: Box Method

Use boxes to separate each step:

┌─────────────┐    ┌─────────────┐
│  Step 1:    │ →  │  Step 2:    │
│  35 + 20    │    │  55 - 12    │
│  = 55       │    │  = 43       │
└─────────────┘    └─────────────┘
                         ↓
                    Answer: 43

Strategy 3: Story Map

Create a timeline of events:

Event 1: Had 30   Event 2: Got 15   Event 3: Gave 8
   30      →         30 + 15    →      45 - 8 = 37

Strategy 4: Draw the Situation

Sketch what's happening: - Draw objects for the starting amount - Draw what's added or cross out what's subtracted - This makes abstract problems concrete

Common Mistakes and How to Avoid Them

Mistake 1: Doing Operations in Wrong Order

Problem: "Ana had 50 pencils. She got 20 more, then gave away 15. How many now?"

Wrong: 50 - 15 + 20 = 55 (did subtraction first) Right: 50 + 20 - 15 = 55 (followed the story's order)

Solution: Always follow the order of events as described in the problem!

Mistake 2: Using Original Number Twice

Problem: "Start with 40, add 10, then subtract 8"

Wrong: 40 + 10 = 50, then 40 - 8 = 32 (used 40 again!) Right: 40 + 10 = 50, then 50 - 8 = 42 (used the result from step 1)

Solution: Remember that step 2 starts with the answer from step 1, not the original number!

Mistake 3: Combining Steps Incorrectly

Problem: "Had 30, got 12, gave away 7"

Wrong: 30 + 12 - 7 all at once without thinking about steps Right: Step 1: 30 + 12 = 42, Step 2: 42 - 7 = 35

Solution: Solve one step at a time, even if you could combine operations!

Mistake 4: Forgetting the Question

Problem: Solve both steps correctly but forget what the question asks

Solution: Circle the question at the start. After solving, make sure you answered it!

Practice Activities

Activity 1: Step Separator

Materials: Word problems, highlighters

Activity: 1. Read a two-step problem 2. Highlight step 1 in yellow 3. Highlight step 2 in blue 4. This helps you see the two parts clearly

Activity 2: Create Your Own

Activity: 1. Start with a one-step problem 2. Add a "then" or "later" clause 3. Now it's a two-step problem! 4. Solve your created problem

Example: - One-step: "I had 25 cards and got 15 more" - Two-step: "I had 25 cards, got 15 more, then gave away 10"

Activity 3: Problem Acting

Materials: Counters or blocks

Activity: 1. Use objects to act out each step 2. First action: physically add or remove objects 3. Second action: add or remove from the new amount 4. Count what's left for your answer

Activity 4: Two-Step Stories

Activity: - Write stories from your life that involve two steps - "I had $30, earned $15 more, then spent $12" - Share with classmates and solve each other's problems

Real-World Applications

Two-step problems appear constantly in daily life:

Money Management

"You have $45. You earn $20 from chores, then buy a toy for $18. How much money do you have now?" - Step 1: 45 + 20 = $65 - Step 2: 65 - 18 = $47

Cooking and Recipes

"Recipe needs 50 cups. You have 28 cups, add 30 more cups, then use 25 cups. How many cups left?" - Step 1: 28 + 30 = 58 cups - Step 2: 58 - 25 = 33 cups

Collections

"You have 42 stamps, trade for 18 more, then give 15 to a friend. How many stamps now?" - Step 1: 42 + 18 = 60 stamps - Step 2: 60 - 15 = 45 stamps

Games and Points

"Team scored 35 points, then 22 more points, then lost 10 points for a penalty. Final score?" - Step 1: 35 + 22 = 57 points - Step 2: 57 - 10 = 47 points

Building Problem-Solving Confidence

Start Simple

Begin with problems where: - Numbers are small - Actions are clearly stated - The sequence is obvious

Gradually work up to more complex problems.

Use Tools

Don't hesitate to use: - Drawings - Number lines - Manipulatives - Written organization

Tools help you think clearly!

Talk It Through

Explain your thinking out loud: - "First, I need to..." - "Then, using that answer, I..." - Verbalizing helps organize thoughts

Check with Estimation

Before solving: - Estimate what the answer might be - After solving, check if your answer is close - If way off, recheck your work

Assessment Checkpoints

You've mastered two-step word problems when you can: - ✓ Identify that a problem has two steps - ✓ Determine the correct order of operations - ✓ Solve step 1 correctly - ✓ Use the step 1 answer in step 2 - ✓ Write clear equations for each step - ✓ Explain your reasoning - ✓ Verify your answer makes sense

Looking Ahead

Mastering two-step problems prepares you for: - Three or more step problems: Even longer problem sequences - Mixed operations: Problems with addition, subtraction, multiplication, and division - Algebraic thinking: Using variables in multi-step equations - Complex real-world problems: Applying math to intricate situations

Conclusion

Two-step word problems challenge you to think sequentially and logically, using the result of one operation as the foundation for the next. They reflect how real-world situations often unfold in stages. By breaking problems into clear steps, using visual strategies, and practicing regularly, you'll develop strong problem-solving skills that extend far beyond mathematics. Remember, every complex problem is just a series of simpler problems solved in order. Take it one step at a time, and you'll reach the solution successfully!

Solve two-step word problems combining addition and subtraction within 100

Two-Step Word Problems

Understanding Multi-Step Problems

Two-step word problems represent a significant leap in mathematical thinking. Unlike one-step problems that require a single operation, two-step problems ask you to perform two calculations in sequence, using the result from the first step to complete the second step. These problems more closely reflect real-world situations where multiple actions occur, making them both more challenging and more useful.

What Makes It a Two-Step Problem?

A two-step word problem requires you to: 1. Perform one mathematical operation (addition or subtraction) 2. Use that result to perform a second operation 3. The answer to step one becomes the starting point for step two

Example: "Carlos had 35 toy cars. He bought 15 more cars, then gave 12 cars to his brother. How many cars does Carlos have now?"

Step 1: Add the cars he bought: 35 + 15 = 50 cars Step 2: Subtract the cars he gave away: 50 - 12 = 38 cars

Notice how the answer from step 1 (50) becomes the starting number for step 2!

Why Two-Step Problems Matter

These problems are important because: - They reflect real life: Most real situations involve multiple steps - They develop logical thinking: You must think through a sequence - They build problem-solving skills: You learn to break complex problems into parts - They prepare you for algebra: Multi-step thinking is foundational for equations - They strengthen perseverance: You learn to work through challenges systematically

Common Types of Two-Step Problems

Type 1: Add-Then-Subtract

Start with an amount, add to it, then take something away.

Structure: Start → Add → Subtract → Final answer

Example: "A store had 42 books. They received 28 more books. Then they sold 15 books. How many books does the store have now?"

Solution: - Step 1: 42 + 28 = 70 books (after receiving more) - Step 2: 70 - 15 = 55 books (after selling some) - Answer: 55 books

Real-Life Context: This happens when you gain something then lose something—getting allowance then spending some, receiving items then giving some away.

Type 2: Subtract-Then-Add

Start with an amount, take something away, then add something back.

Structure: Start → Subtract → Add → Final answer

Example: "Maria had 65 stickers. She gave 20 stickers to her friend. Then she bought 18 more stickers. How many stickers does Maria have now?"

Solution: - Step 1: 65 - 20 = 45 stickers (after giving some away) - Step 2: 45 + 18 = 63 stickers (after buying more) - Answer: 63 stickers

Real-Life Context: This reflects situations where you lose something then gain something—spending money then earning more, using supplies then restocking.

Type 3: Add-Then-Add (Multiple Additions)

Start with an amount, add something, then add something else.

Structure: Start → Add → Add again → Total

Example: "A classroom has 24 students. Then 6 more students join. Later, 5 more students arrive. How many students are in the classroom now?"

Solution: - Step 1: 24 + 6 = 30 students (after first group joins) - Step 2: 30 + 5 = 35 students (after second group arrives) - Answer: 35 students

Real-Life Context: Accumulating things in stages—collecting items over time, adding ingredients in cooking.

Type 4: Subtract-Then-Subtract (Multiple Subtractions)

Start with an amount, take something away, then take more away.

Structure: Start → Subtract → Subtract again → Remaining

Example: "Ahmed had 80 trading cards. He traded away 15 cards in the morning. Then he gave 22 cards to his cousin in the afternoon. How many trading cards does Ahmed have left?"

Solution: - Step 1: 80 - 15 = 65 cards (after morning trade) - Step 2: 65 - 22 = 43 cards (after giving to cousin) - Answer: 43 cards

Real-Life Context: Multiple expenses or losses—spending money twice, losing items at different times.

Type 5: Combined Groups Then Action

Combine two or more groups first, then perform an operation on the total.

Structure: Group 1 + Group 2 → Combined total → Add to or subtract from total

Example: "There are 28 red balloons and 32 blue balloons at a party. Then 15 more balloons are added. How many balloons are there now?"

Solution: - Step 1: 28 + 32 = 60 balloons (red and blue combined) - Step 2: 60 + 15 = 75 balloons (after adding more) - Answer: 75 balloons

The Problem-Solving Process for Two-Step Problems

Follow this systematic approach:

Step 1: Read the Entire Problem

Read all the way through without stopping. Get the big picture of what's happening in the story.

Goal: Understand the overall situation and what's being asked.

Step 2: Identify All the Actions

Look for action words and phrases that indicate what happens in sequence: - "Then..." indicates a second action - "Later..." shows something happens after - "After that..." signals the next step

Example: "First she bought some, then she used some" - Two actions: buying (addition) and using (subtraction)

Step 3: Break It Into Two Parts

Mentally or physically divide the problem: - Part 1: What happens first? - Part 2: What happens next?

Draw a line or use different colors to separate the two parts.

Step 4: Solve Step One

Focus only on the first part: - Identify the numbers involved in step 1 - Determine if you need to add or subtract - Write and solve the equation - This answer becomes your "new starting point"

Step 5: Solve Step Two

Use your answer from step 1: - This is now your starting number for step 2 - Identify what happens next in the story - Determine if you add or subtract - Write and solve the second equation

Step 6: Answer the Question

Make sure your final answer addresses what the problem asks: - Use complete sentences - Include the proper labels (books, dollars, students, etc.) - Check that you answered the right question

Step 7: Check Your Work

Verify your solution makes sense: - Does the sequence of operations match the story? - Is your final answer reasonable? - Did you use the correct operations? - Can you trace your steps backward?

Visual Strategies for Two-Step Problems

Strategy 1: Number Path Diagram

Draw a path showing each step:

Start: 45
   ↓ +20
  65
   ↓ -18
  47 ← Final Answer

This visual shows the journey from start to finish.

Strategy 2: Box Method

Use boxes to separate each step:

┌─────────────┐    ┌─────────────┐
│  Step 1:    │ →  │  Step 2:    │
│  35 + 20    │    │  55 - 12    │
│  = 55       │    │  = 43       │
└─────────────┘    └─────────────┘
                         ↓
                    Answer: 43

Strategy 3: Story Map

Create a timeline of events:

Event 1: Had 30   Event 2: Got 15   Event 3: Gave 8
   30      →         30 + 15    →      45 - 8 = 37

Strategy 4: Draw the Situation

Sketch what's happening: - Draw objects for the starting amount - Draw what's added or cross out what's subtracted - This makes abstract problems concrete

Common Mistakes and How to Avoid Them

Mistake 1: Doing Operations in Wrong Order

Problem: "Ana had 50 pencils. She got 20 more, then gave away 15. How many now?"

Wrong: 50 - 15 + 20 = 55 (did subtraction first) Right: 50 + 20 - 15 = 55 (followed the story's order)

Solution: Always follow the order of events as described in the problem!

Mistake 2: Using Original Number Twice

Problem: "Start with 40, add 10, then subtract 8"

Wrong: 40 + 10 = 50, then 40 - 8 = 32 (used 40 again!) Right: 40 + 10 = 50, then 50 - 8 = 42 (used the result from step 1)

Solution: Remember that step 2 starts with the answer from step 1, not the original number!

Mistake 3: Combining Steps Incorrectly

Problem: "Had 30, got 12, gave away 7"

Wrong: 30 + 12 - 7 all at once without thinking about steps Right: Step 1: 30 + 12 = 42, Step 2: 42 - 7 = 35

Solution: Solve one step at a time, even if you could combine operations!

Mistake 4: Forgetting the Question

Problem: Solve both steps correctly but forget what the question asks

Solution: Circle the question at the start. After solving, make sure you answered it!

Practice Activities

Activity 1: Step Separator

Materials: Word problems, highlighters

Activity: 1. Read a two-step problem 2. Highlight step 1 in yellow 3. Highlight step 2 in blue 4. This helps you see the two parts clearly

Activity 2: Create Your Own

Activity: 1. Start with a one-step problem 2. Add a "then" or "later" clause 3. Now it's a two-step problem! 4. Solve your created problem

Example: - One-step: "I had 25 cards and got 15 more" - Two-step: "I had 25 cards, got 15 more, then gave away 10"

Activity 3: Problem Acting

Materials: Counters or blocks

Activity: 1. Use objects to act out each step 2. First action: physically add or remove objects 3. Second action: add or remove from the new amount 4. Count what's left for your answer

Activity 4: Two-Step Stories

Activity: - Write stories from your life that involve two steps - "I had $30, earned $15 more, then spent $12" - Share with classmates and solve each other's problems

Real-World Applications

Two-step problems appear constantly in daily life:

Money Management

"You have $45. You earn $20 from chores, then buy a toy for $18. How much money do you have now?" - Step 1: 45 + 20 = $65 - Step 2: 65 - 18 = $47

Cooking and Recipes

"Recipe needs 50 cups. You have 28 cups, add 30 more cups, then use 25 cups. How many cups left?" - Step 1: 28 + 30 = 58 cups - Step 2: 58 - 25 = 33 cups

Collections

"You have 42 stamps, trade for 18 more, then give 15 to a friend. How many stamps now?" - Step 1: 42 + 18 = 60 stamps - Step 2: 60 - 15 = 45 stamps

Games and Points

"Team scored 35 points, then 22 more points, then lost 10 points for a penalty. Final score?" - Step 1: 35 + 22 = 57 points - Step 2: 57 - 10 = 47 points

Building Problem-Solving Confidence

Start Simple

Begin with problems where: - Numbers are small - Actions are clearly stated - The sequence is obvious

Gradually work up to more complex problems.

Use Tools

Don't hesitate to use: - Drawings - Number lines - Manipulatives - Written organization

Tools help you think clearly!

Talk It Through

Explain your thinking out loud: - "First, I need to..." - "Then, using that answer, I..." - Verbalizing helps organize thoughts

Check with Estimation

Before solving: - Estimate what the answer might be - After solving, check if your answer is close - If way off, recheck your work

Assessment Checkpoints

You've mastered two-step word problems when you can: - ✓ Identify that a problem has two steps - ✓ Determine the correct order of operations - ✓ Solve step 1 correctly - ✓ Use the step 1 answer in step 2 - ✓ Write clear equations for each step - ✓ Explain your reasoning - ✓ Verify your answer makes sense

Looking Ahead

Mastering two-step problems prepares you for: - Three or more step problems: Even longer problem sequences - Mixed operations: Problems with addition, subtraction, multiplication, and division - Algebraic thinking: Using variables in multi-step equations - Complex real-world problems: Applying math to intricate situations

Conclusion

Two-step word problems challenge you to think sequentially and logically, using the result of one operation as the foundation for the next. They reflect how real-world situations often unfold in stages. By breaking problems into clear steps, using visual strategies, and practicing regularly, you'll develop strong problem-solving skills that extend far beyond mathematics. Remember, every complex problem is just a series of simpler problems solved in order. Take it one step at a time, and you'll reach the solution successfully!

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