Math Worksheet for 20-Year-Old Students

Free worksheet covering Math. Created with Learning Corner's AI-powered tools.

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Instructions

  1. Complete the questions in order. They begin with easier skills and become more challenging.
  2. Show your work when solving addition, subtraction, or word problems.
  3. For multiple-choice questions, circle the best answer.
  4. Use the optional challenge section if you finish early.

Helpful example: 14 + 3 = 17 because 14, 15, 16, 17.

Section 1: Number Sense to 20

  1. Write the number that comes after 9: __

  2. Write the number that comes before 16: __

  3. Fill in the missing numbers: 4, 5, __, 7, __, 9

  4. Circle the greater number: 12 or 18

  5. Circle the smaller number: 7 or 15

  6. Draw dots or small pictures to show 20.

Section 2: Addition and Subtraction

Solve each problem.

  1. 6 + 3 = __

  2. 8 + 7 = __

  3. 10 + 10 = __

  4. 17 − 5 = __

  5. 20 − 8 = __

  6. 13 − 13 = __

  7. Which number sentence equals 20? Circle one.

  • 9 + 10
  • 12 + 8
  • 15 − 4

Section 3: Choose and Explain

  1. Circle the number that makes the sentence true.

11 + __ = 20

  • 7
  • 8
  • 9
  1. Circle the number that makes the sentence true.

20 − __ = 14

  • 5
  • 6
  • 7
  1. Mark each statement True or False.
  • 8 + 5 = 13: True / False
  • 19 − 4 = 14: True / False
  • 10 + 10 = 20: True / False
  1. Explain how you know that 18 is greater than 15.

Section 4: Math in Real Life

  1. Mia has 8 crayons. Her teacher gives her 7 more crayons. How many crayons does Mia have now?

Number sentence: __

Answer: __ crayons

  1. A basket has 20 apples. Six apples are used to make lunch. How many apples are left?

Number sentence: __

Answer: __ apples

  1. You have 12 points in a game. You earn enough points to reach 20. How many more points do you need?

Number sentence: __

Answer: __ points

Number-Bond Organizer

Example:

Whole Part Part
10 6 4

Complete the number bonds. Each row shows a whole of 20.

Whole Part Part
20 8 __
20 __ 5
20 11 __
20 __ 13
20 15 __

Optional Challenge

A shop has 20 balloons. Four balloons pop, and then the shop receives 6 new balloons. How many balloons does the shop have now? Show two steps.

Answer: __ balloons

Answer Key

  1. 10
  2. 15
  3. 6, 8
  4. 18
  5. 7
  6. Answers should show 20 dots or pictures.
  7. 9
  8. 15
  9. 20
  10. 12
  11. 12
  12. 0
  13. 12 + 8
  14. 9
  15. 6
  16. True; False; True
  17. Sample answer: 18 is greater because it comes after 15 when counting, or because 18 has 3 more than 15.
  18. 8 + 7 = 15; 15 crayons
  19. 20 − 6 = 14; 14 apples
  20. 20 − 12 = 8; 8 points

Number-Bond Organizer:

  • 20, 8, 12
  • 20, 15, 5
  • 20, 11, 9
  • 20, 7, 13
  • 20, 15, 5

Optional Challenge: 20 − 4 = 16, then 16 + 6 = 22. The shop has 22 balloons.

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