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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 199 · 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. 1.7 + ? = 10
  2. 2.83 + ? = 100
  3. 3.28 + ? = 100
  4. 4.5 + ? = 10
  5. 5.21 + ? = 100
  6. 6.2 + ? = 10
  7. 7.22 + ? = 100
  8. 8.19 + ? = 100
  9. 9.4 + ? = 10
  10. 10.27 + ? = 100
  11. 11.58 + ? = 100
  12. 12.41 + ? = 100
  13. 13.71 + ? = 100
  14. 14.66 + ? = 100
  15. 15.36 + ? = 100
  16. 16.33 + ? = 100
  17. 17.84 + ? = 100
  18. 18.17 + ? = 100
  19. 19.30 + ? = 100
  20. 20.3 + ? = 10
  21. 21.1 + ? = 10
  22. 22.61 + ? = 100
  23. 23.16 + ? = 100
  24. 24.12 + ? = 100
  25. 25.43 + ? = 100
  26. 26.6 + ? = 10
  27. 27.44 + ? = 100
  28. 28.51 + ? = 100
  29. 29.23 + ? = 100
  30. 30.50 + ? = 100
  31. 31.38 + ? = 100
  32. 32.57 + ? = 100
  33. 33.25 + ? = 100
  34. 34.8 + ? = 10
  35. 35.65 + ? = 100
  36. 36.81 + ? = 100
  37. 37.18 + ? = 100
  38. 38.42 + ? = 100
  39. 39.34 + ? = 100
  40. 40.59 + ? = 100

Answer key

  1. 3
  2. 17
  3. 72
  4. 5
  5. 79
  6. 8
  7. 78
  8. 81
  9. 6
  10. 73
  11. 42
  12. 59
  13. 29
  14. 34
  15. 64
  16. 67
  17. 16
  18. 83
  19. 70
  20. 7
  21. 9
  22. 39
  23. 84
  24. 88
  25. 57
  26. 4
  27. 56
  28. 49
  29. 77
  30. 50
  31. 62
  32. 43
  33. 75
  34. 2
  35. 35
  36. 19
  37. 82
  38. 58
  39. 66
  40. 41

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