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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 592 · 40 questions
TalentJR

How to do it in your head (Make 10): Bonds to 10: 1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5. Bonds to 100: the ones make 10, and the tens make 9 (because the ones already gave one ten). If the number ends in 0, the tens make 10: 40 + 60 = 100.

NameDateTime takenScore ___ / 40
  1. 1.12 + ? = 100
  2. 2.8 + ? = 10
  3. 3.6 + ? = 10
  4. 4.2 + ? = 10
  5. 5.70 + ? = 100
  6. 6.29 + ? = 100
  7. 7.21 + ? = 100
  8. 8.20 + ? = 100
  9. 9.62 + ? = 100
  10. 10.25 + ? = 100
  11. 11.4 + ? = 10
  12. 12.3 + ? = 10
  13. 13.9 + ? = 10
  14. 14.58 + ? = 100
  15. 15.1 + ? = 10
  16. 16.30 + ? = 100
  17. 17.26 + ? = 100
  18. 18.5 + ? = 10
  19. 19.27 + ? = 100
  20. 20.57 + ? = 100
  21. 21.34 + ? = 100
  22. 22.77 + ? = 100
  23. 23.78 + ? = 100
  24. 24.40 + ? = 100
  25. 25.67 + ? = 100
  26. 26.7 + ? = 10
  27. 27.16 + ? = 100
  28. 28.71 + ? = 100
  29. 29.53 + ? = 100
  30. 30.64 + ? = 100
  31. 31.85 + ? = 100
  32. 32.66 + ? = 100
  33. 33.23 + ? = 100
  34. 34.47 + ? = 100
  35. 35.84 + ? = 100
  36. 36.32 + ? = 100
  37. 37.31 + ? = 100
  38. 38.88 + ? = 100
  39. 39.43 + ? = 100
  40. 40.17 + ? = 100

Answer key

  1. 88
  2. 2
  3. 4
  4. 8
  5. 30
  6. 71
  7. 79
  8. 80
  9. 38
  10. 75
  11. 6
  12. 7
  13. 1
  14. 42
  15. 9
  16. 70
  17. 74
  18. 5
  19. 73
  20. 43
  21. 66
  22. 23
  23. 22
  24. 60
  25. 33
  26. 3
  27. 84
  28. 29
  29. 47
  30. 36
  31. 15
  32. 34
  33. 77
  34. 53
  35. 16
  36. 68
  37. 69
  38. 12
  39. 57
  40. 83

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