Solved Exercises on Subtraction Word Problem Practice in 1st Grade

Master subtraction word problems: practice problems, problem solving strategies, and visual methods through these 3 detailed exercises.

Solution: Exercises 1 to 3
1 Basic practice
Exercise 1
Solve the word problem:
"Emma had 6 balloons. She gave 2 to her friend. How many balloons does Emma have left?"
Definition:

Word problem: A mathematical problem expressed in everyday language that requires subtraction to solve. It describes a real-life situation involving numbers.

Problem solving method:
  1. Read the problem carefully
  2. Identify the key words that indicate subtraction
  3. Find the numbers involved
  4. Set up the subtraction equation
  5. Solve the equation
  6. Check if the answer makes sense
"Emma had 6 balloons. She gave 2 to her friend. How many balloons does Emma have left?"
1
Key words: "gave" and "left" indicate subtraction
2
Numbers: Emma started with 6 balloons, gave away 2
3
Equation: 6 - 2 = ?
4
Solution: 6 - 2 = 4
Start with 6
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Gave away 2
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Remain 4
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Step 1: Identify the starting number

Emma started with 6 balloons

Step 2: Identify what was taken away

She gave away 2 balloons to her friend

Step 3: Set up the subtraction

6 - 2 = ?

\(6 - 2 = 4\)
Final answer:

Emma has 4 balloons left.

Applied rules:

• Key words: "gave" and "left" signal subtraction

• Problem structure: Starting amount - amount given away = remaining

• Visual method: Drawing pictures helps understand the problem

2 Intermediate practice
Exercise 2
Solve the word problem:
"There were 8 ducks in the pond. 3 ducks flew away. How many ducks are still in the pond?"
Definition:

Intermediate word problem: A subtraction problem that may involve slightly larger numbers or more complex scenarios but still follows the basic subtraction pattern.

"There were 8 ducks in the pond. 3 ducks flew away. How many ducks are still in the pond?"
1
Key phrase: "flew away" indicates subtraction
2
Numbers: Started with 8 ducks, 3 flew away
3
Equation: 8 - 3 = ?
4
Solution: 8 - 3 = 5
Start with 8
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3 flew away
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Remain 5
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Step 1: Identify the key phrase "flew away"

"Flew away" means ducks left, so we subtract

Step 2: Identify the starting number

We started with 8 ducks in the pond

Step 3: Identify the number taken away

3 ducks flew away

\(8 - 3 = 5\)
Final answer:

There are 5 ducks still in the pond.

Applied rules:

• Key words: "flew away" signals subtraction

• Problem structure: Initial amount - amount removed = final amount

• Visualization: Picture the scenario to understand the problem

3 Advanced practice
Exercise 3
Solve the word problem:
"Ben had 9 cookies. He ate 3 and gave 2 to his sister. How many cookies does Ben have left?"
Definition:

Advanced word problem: A multi-step subtraction problem that requires performing multiple subtraction operations in sequence.

"Ben had 9 cookies. He ate 3 and gave 2 to his sister. How many cookies does Ben have left?"
1
Key words: "ate" and "gave" indicate subtractions
2
First subtraction: 9 - 3 = 6 (after eating)
3
Second subtraction: 6 - 2 = 4 (after giving)
4
Total: 9 - 3 - 2 = 4
Step 1: Identify all key words

"ate" and "gave" both mean Ben lost cookies

Step 2: Handle first action

Start with 9, subtract 3 eaten: 9 - 3 = 6

Step 3: Handle second action

Now subtract 2 given away: 6 - 2 = 4

\(9 - 3 - 2 = 4\)
Final answer:

Ben has 4 cookies left.

Applied rules:

• Multiple key words: "ate" and "gave" both require subtraction

• Sequential operations: Solve one subtraction at a time

• Order matters: Apply operations in the sequence described

Additional Practice Problems
\( \text{Practice Makes Perfect} \)
More Subtraction Word Problems
Problem 1
Lisa had 7 crayons. She lost 4 at school. How many crayons does Lisa have now?
Answer: 7 - 4 = 3. Lisa has 3 crayons now.
Problem 2
There were 10 birds on a tree. 6 birds flew to another tree. How many birds are left on the first tree?
Answer: 10 - 6 = 4. There are 4 birds left on the first tree.
Problem 3
Mike had 5 stickers. He gave 1 to Tom and 2 to Anna. How many stickers does Mike have left?
Answer: 5 - 1 - 2 = 2. Mike has 2 stickers left.
Problem 4
Sarah had 8 flowers. She picked 3 more from the garden. Then she gave 4 to her mom. How many flowers does Sarah have now?
Answer: 8 + 3 - 4 = 7. Sarah has 7 flowers now.
Problem 5
There were 9 children playing. 2 went home early. Then 1 more went home. How many children are still playing?
Answer: 9 - 2 - 1 = 6. There are 6 children still playing.
Key Steps for Success:
  • Read the problem twice to understand the situation
  • Circle or underline important numbers
  • Look for key words that indicate subtraction
  • Draw a picture if it helps
  • Write the equation
  • Solve and check your answer
Practice Tips:

• Start with easier problems: Build confidence with simpler numbers

• Use manipulatives: Counters, blocks, or fingers can help visualize

• Check your work: Always verify your answer makes sense in the story

Problem Solving Strategies
\( \text{Read} \rightarrow \text{Identify} \rightarrow \text{Solve} \rightarrow \text{Check} \)
Four-Step Process
Four-step process:

Read: Carefully read the entire problem to understand the situation.

Identify: Find key words and numbers, determine the operation needed.

Solve: Set up the equation and perform the calculation.

Check: Verify that the answer makes sense in the context of the problem.

Detailed problem-solving approach:
  1. Read the problem completely: Understand the story or situation described
  2. Circle key words: Mark words that indicate subtraction operations
  3. Underline numbers: Identify all relevant numbers in the problem
  4. Determine the question: What is the problem asking you to find?
  5. Draw a picture: Visualize the problem if helpful
  6. Write the equation: Convert the word problem to a mathematical expression
  7. Solve: Calculate the answer
  8. Check: Make sure your answer fits the context of the problem
Tip 1: Look for action words like "gave", "took", "ate" to identify subtraction.
Tip 2: Questions asking "how many are left?" usually require subtraction.
Tip 3: Draw pictures to help visualize the problem.
Tip 4: Check your answer by adding it back to the subtracted amount.
Common errors: Misreading key words, subtracting in the wrong direction, forgetting to identify all numbers in multi-step problems.
Success strategies: Circle key words, underline numbers, draw pictures, check answers.
Problem-solving concepts to remember:

• Subtraction means taking away or finding the difference

• Always check if your answer makes sense in the story

• Some problems have multiple steps requiring several operations

• Words like "altogether" or "total" might be misleading in subtraction problems

Detailed Summary: Subtraction Word Problem Practice
Complete Learning Guide
Definition of Subtraction Word Problems: Word problems that require subtraction to solve. They present real-life situations where quantities are reduced or compared, expressed through language rather than pure numbers.
Key Terms:
  • Key Words: Words that signal which mathematical operation to use (e.g., "left", "gave", "taken")
  • Problem Structure: The organization of information in a word problem (starting amount, action, question)
  • Multi-step Problems: Problems that require more than one operation to solve
  • Minuend: The starting number in a subtraction problem
  • Subtrahend: The number being subtracted
  • Difference: The result of a subtraction problem
Core Rules of Word Problem Language:
  • Key Word Recognition: Certain words consistently indicate subtraction (left, gave, took, away, etc.)
  • Context Clues: The situation described helps determine the operation needed
  • Question Analysis: Understanding what is being asked determines the setup
  • Sequential Operations: Multi-step problems require operations in the order presented
Step-by-Step Method:
  1. Read the entire problem carefully
  2. Identify key words that signal subtraction
  3. Circle or underline important numbers
  4. Determine what the question is asking
  5. Draw a picture or model if helpful
  6. Write the subtraction equation
  7. Solve the equation
  8. Check if the answer makes sense in the context
Key Words for Subtraction:
  • Action words: gave, took, ate, spent, used, lost, sold, borrowed
  • Remaining words: left, remaining, still, stayed, kept
  • Comparison words: less, fewer, difference, shorter, smaller
  • Change words: decreased, reduced, dropped, fell
Examples (Simple to Advanced):
  • Simple: "I had 5 apples and ate 2. How many are left?" (5 - 2 = 3)
  • Medium: "There were 8 cars in the parking lot. 3 drove away. How many remain?" (8 - 3 = 5)
  • Advanced: "Sarah had 10 stickers. She gave 2 to Mike and 3 to Jane. How many does she have left?" (10 - 2 - 3 = 5)
Tips and Tricks:
  • Create a personal list of subtraction key words to remember
  • Always reread the problem after solving to check your answer
  • Draw simple pictures to visualize the problem situation
  • Check your answer by adding it back to the subtracted amount
  • Pay attention to the order of operations in multi-step problems
Common Pitfalls:
  • Misidentifying key words and using the wrong operation
  • Forgetting to consider all parts of multi-step problems
  • Subtracting in the wrong direction (smaller from larger)
  • Not checking if the answer makes sense in the context
Memory Aids:
  • "Subtraction words often describe things going away!"
  • "Look for words about giving, taking, losing, or spending!"
  • "Questions about 'how many left' usually mean subtract!"
  • Practice with real-life scenarios to build understanding
Checking Your Work: Always verify your answer makes sense in the story. For example, if you started with 7 items and some were taken away, your answer should be less than 7.

Questions & Answers

Question: I'm getting better at solving subtraction word problems, but sometimes I still get confused when there are big numbers. How can I practice with bigger numbers?

Answer: Great progress! Here's how to practice with bigger numbers in subtraction word problems:

  • Start with what you know: Use the same problem-solving steps you've learned with bigger numbers
  • Use tools: Counters, number lines, or your fingers can help with bigger numbers too
  • Break it down: For numbers like 9 - 4, think "9, 8, 7, 6, 5" - that's 4 steps backward
  • Look for patterns: If you know 5 - 2 = 3, then 15 - 2 = 13 follows the same pattern
  • Practice regularly: The more you practice, the more comfortable you'll become

Example: "There were 10 birds and 4 flew away" uses the same thinking as "There were 5 birds and 2 flew away," just with bigger numbers!

Remember: the key words and problem structure stay the same regardless of the numbers!

Question: What if I finish all my practice problems and want more? Where can I find more subtraction word problems to solve?

Answer: It's wonderful that you want more practice! Here are places to find additional subtraction word problems:

  • Math workbooks: Look for 1st grade math books with word problem sections
  • Online resources: Educational websites offer printable worksheets
  • Create your own: Make up stories about your toys, snacks, or friends
  • Ask family: Parents, siblings, or relatives can create problems for you
  • Real life: Notice subtraction situations in daily life (sharing snacks, counting toys, etc.)

Here are a few extra problems to try:

  • "Mom bought 8 apples. We ate 3. How many are left?"
  • "I had 6 pencils. I lost 2. How many do I have now?"
  • "There were 9 kids at the party. 4 went home. How many are still there?"

The more you practice, the better you'll become!

Question: I'm good at the simple subtraction problems, but I still struggle with the problems that have more than one thing happening. How can I get better at those?

Answer: Multi-step problems can be tricky, but here's a strategy to master them:

  • Slow down: Read the problem more slowly and break it into parts
  • Mark each action: Put a line under each thing that happens (first action, second action, etc.)
  • Solve step by step: Only solve one action at a time
  • Keep track: Write down the result after each step
  • Visualize: Draw a picture for each step of the problem

Example: "Jake had 7 cookies. He ate 2 and gave 1 to his friend."

Step 1: Start with 7 cookies

Step 2: After eating 2: 7 - 2 = 5 cookies left

Step 3: After giving 1: 5 - 1 = 4 cookies left

Practice with problems that have 2 steps first, then try 3-step problems when you're ready!