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Fifth/Subtraction

Mixed Addition and Subtraction Word Problems to 20

Practice solving mixed addition and subtraction problems within 20.
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Practice Questions

  1. If you have 12 apples and get 5 more, then eat 4, how many are left?
    Show answer

    13

  2. You have 15 candies, give 6 to a friend, then get 3 more. How many do you have now?
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    12

  3. There are 10 birds on a tree. 4 fly away, then 6 more come. How many are there now?
    Show answer

    12

  4. A basket has 8 oranges. You add 7 more, then take out 5. How many are left?
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    10

  5. You have 20 pencils, use 8, then buy 5 more. How many do you have now?
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    17

Teacher Resources
Standards
2.OA.A.1
Printable Aids
Operation Keywords PosterNumber Line
Teaching Notes

This collection focuses on helping second graders differentiate between addition and subtraction scenarios within word problems. Encourage students to identify keywords, draw models, or use number lines to visualize the problems and select the correct operation.

Vocabulary
Mixed: A mix of operations.
Operation: Adding or subtracting.
Common Mistakes
  • Guessing the operation instead of look for clues.
  • Confusing 'how many more' (comparison subtraction) with addition.
  • Forgetting to check if the answer makes sense.
Differentiation
SupportProvide manipulatives or drawing templates (e.g., part-part-whole mats, bar models). Highlight keywords that indicate addition (e.g., 'in all,' 'altogether,' 'more') or subtraction (e.g., 'how many left,' 'difference,' 'flew away').
ChallengeEncourage students to write out the equation with a variable before solving. Challenge them to create their own mixed operation word problems within 20 or explain their reasoning verbally/in writing.
Discussion Questions
  • How did you decide if you needed to add or subtract for this problem?
  • What clues or keywords in the problem helped you find the answer?
  • Can you explain your strategy for solving this problem to a partner?
  • What would happen if the numbers in the problem were much larger?
Extension Activities
  • Make up mixed problems.
  • Use a number line.
  • Draw the story.
Parent Tip

Use toys to act out adding and taking away.

Learning Path
Skill Cluster

Operations and Algebraic Thinking

Estimated Time

15 minutes

Skills Practiced
Mixed operations word problemsAddition to 20Subtraction to 20