Mathematics · 1st Grade

Active learning ideas

Solving Subtraction Word Problems

Active learning builds real understanding for subtraction word problems because young students need to physically and visually interact with quantities rather than just hear abstract language. When children manipulate objects or draw matched pairs, they move from guessing based on keywords to reasoning about quantities in both taking-from and comparing situations.

• Common Core State Standards
• CCSS.Math.Content.1.OA.A.1

• 15–25 min
• Pairs → Whole Class
• 3 activities

Activity 01

• Role Play
• 20 min · Whole Class

Role Play: The Comparison Challenge

Two groups of students stand up, each representing a quantity in a comparison problem. The class counts each group and decides how many students in the smaller group have a partner in the larger group, then identifies the leftover as the difference.

Analyze the language in a word problem to determine if subtraction is the correct operation.

Facilitation Tip

During Role Play: The Comparison Challenge, assign roles clearly so students act out quantities and their relationships, not just the action of giving away items.

What to look for

Provide students with two word problems: one 'taking from' and one 'comparing'. Ask them to write the number sentence for each problem and draw a picture to represent one of the problems.

• Apply
• Analyze
• Evaluate
• Social Awareness
• Self-Awareness

Activity 02

• Think-Pair-Share
• 15 min · Pairs

Think-Pair-Share: Predict, Then Calculate

Read a subtraction story aloud without the numbers. Partners guess the approximate answer based on context clues (like fewer, a little, or a lot). Then reveal the numbers and have partners calculate, comparing their prediction to the result.

Compare different strategies for solving a subtraction word problem.

Facilitation Tip

For Think-Pair-Share: Predict, Then Calculate, require students to justify predictions with drawings or manipulatives before calculating.

What to look for

Present a word problem on the board, such as 'Sarah had 8 apples. She gave 3 to her brother. How many apples does Sarah have now?' Ask students to show thumbs up if they know the answer, thumbs sideways if they are unsure, and thumbs down if they need help. Then, ask a few students to explain their strategy.

• Understand
• Apply
• Analyze
• Self-Awareness
• Relationship Skills

Activity 03

• Inquiry Circle
• 25 min · Small Groups

Inquiry Circle: Language Sort

Give small groups a set of word problem cards with key phrases highlighted. Groups sort cards by problem type (taking-from or comparing), then solve and record equations. Groups discuss why certain language signals each type.

Predict the outcome of a story problem before performing the calculation.

Facilitation Tip

In Collaborative Investigation: Language Sort, ask students to physically move word cards into groups rather than just sorting them on paper to reinforce visual matching.

What to look for

Pose the following: 'Maria has 9 stickers and Ben has 5 stickers. How can we find out how many more stickers Maria has than Ben? What words in the problem help us know what to do?' Facilitate a discussion where students share different strategies and explain their reasoning.

• Analyze
• Evaluate
• Create
• Self-Management
• Self-Awareness

A few notes on teaching this unit

Teach subtraction as two distinct models: take-away (physical removal) and comparison (finding the gap). Avoid relying on keywords alone, as they often mislead. Use consistent language like 'how many more' or 'how many fewer' to signal comparison problems. Research shows that students benefit from frequent opportunities to verbalize their thinking while using concrete objects or drawings to anchor their understanding.

Students will confidently model subtraction using objects or drawings, write accurate number sentences for both types of problems, and explain their reasoning using precise math language. They will recognize when the word more signals subtraction in comparison problems, not addition.

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Watch Out for These Misconceptions

• During Think-Pair-Share: Predict, Then Calculate, watch for students who assume the word more always means addition.

  Ask them to draw matched pairs for the quantities and circle the unmatched extras to see that more can signal subtraction in comparison problems.

• During Collaborative Investigation: Language Sort, watch for students who treat comparison problems the same as take-away problems.

  Have them use counters to physically match the two groups side by side, then count the difference to see that no items are removed in comparison.

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Methods used in this brief

• Role Play
• Think-Pair-Share
• Inquiry Circle