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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 243 · 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. 1.78 + ? = 100
  2. 2.19 + ? = 100
  3. 3.68 + ? = 100
  4. 4.2 + ? = 10
  5. 5.45 + ? = 100
  6. 6.15 + ? = 100
  7. 7.9 + ? = 10
  8. 8.86 + ? = 100
  9. 9.48 + ? = 100
  10. 10.26 + ? = 100
  11. 11.8 + ? = 10
  12. 12.4 + ? = 10
  13. 13.69 + ? = 100
  14. 14.21 + ? = 100
  15. 15.87 + ? = 100
  16. 16.29 + ? = 100
  17. 17.72 + ? = 100
  18. 18.1 + ? = 10
  19. 19.40 + ? = 100
  20. 20.16 + ? = 100
  21. 21.7 + ? = 10
  22. 22.3 + ? = 10
  23. 23.22 + ? = 100
  24. 24.43 + ? = 100
  25. 25.84 + ? = 100
  26. 26.58 + ? = 100
  27. 27.12 + ? = 100
  28. 28.11 + ? = 100
  29. 29.59 + ? = 100
  30. 30.28 + ? = 100
  31. 31.89 + ? = 100
  32. 32.62 + ? = 100
  33. 33.57 + ? = 100
  34. 34.39 + ? = 100
  35. 35.37 + ? = 100
  36. 36.63 + ? = 100
  37. 37.64 + ? = 100
  38. 38.17 + ? = 100
  39. 39.30 + ? = 100
  40. 40.74 + ? = 100

Answer key

  1. 22
  2. 81
  3. 32
  4. 8
  5. 55
  6. 85
  7. 1
  8. 14
  9. 52
  10. 74
  11. 2
  12. 6
  13. 31
  14. 79
  15. 13
  16. 71
  17. 28
  18. 9
  19. 60
  20. 84
  21. 3
  22. 7
  23. 78
  24. 57
  25. 16
  26. 42
  27. 88
  28. 89
  29. 41
  30. 72
  31. 11
  32. 38
  33. 43
  34. 61
  35. 63
  36. 37
  37. 36
  38. 83
  39. 70
  40. 26

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