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Number Bonds to 20 Mental Math Activity

Improve mental math skills by completing missing number problems for numbers up to 20. Aim to answer at least 15 out of 20 questions correctly. Enhance addition and subtraction fluency for numbers up to 20.

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Number Bonds to 20 Mental Math Activity

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  1. Number bonds to 20 Mental Mathematics Starters Activity 5

  2. Mathematics Objective • Know by heart all addition and subtraction facts for each number to 20.

  3. Using this should help you learn: • To remember number bonds to 20 so you can quickly answer questions correctly. • Target = 15 out of 20

  4. 1. Write the missing number: • 3 + 4 =  • 5 +  = 9

  5. 2. Write the missing number: • 7 + 4 =  • 6 +  = 12

  6. 3. Write the missing number: • 9 +  = 14 • 15 -  = 9

  7. 4. Write the missing number: • 6 + 7 =  •  - 8 = 9

  8. 5. Write the missing number: • 6 +  = 12 •  + 7 = 19

  9. 6. Write the missing number: •  + 2 = 11 • 10 +  = 16

  10. 7. Write the missing number: • 6 +  = 19 • 5 + 9 = 

  11. 8. Write the missing number: • 3 + 14 =  • 18 -  = 7

  12. 9. Write the missing number: • 13 + 7 =  • 9 +  = 20

  13. 10. Write the missing number: • 13 + 4 =  • 13 -  = 9

  14. 11. Write the missing number: • 7 + 7 =  • 8 +  = 19

  15. 12. Write the missing number: •  + 8 = 11 • 12 +  = 20

  16. 13. Write the missing number: • 17 +  = 20 • 20 -  = 9

  17. 14. Write the missing number: • 15 + 2 =  • 17 - 9 = 

  18. 15. Write the missing number: • 8 + 8 =  • 19 +  = 19

  19. 16. Write the missing number: • 2 + 16 =  • 9 +  = 16

  20. 17. Write the missing number: • 20 +  = 20 • 20 -  = 7

  21. 18. Write the missing number: • 3 + 4 =  • 5 +  = 9

  22. 19. Write the missing number: • 3 + 4 =  • 5 +  = 9

  23. 20. Write the missing number: • 3 + 4 =  • 5 +  = 9

  24. Evaluation . . . Did you: • Answer at least 15 out of the 20 questions correctly?

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