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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 569 · 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. 1.5 + ? = 10
  2. 2.7 + ? = 10
  3. 3.82 + ? = 100
  4. 4.57 + ? = 100
  5. 5.11 + ? = 100
  6. 6.13 + ? = 100
  7. 7.6 + ? = 10
  8. 8.69 + ? = 100
  9. 9.9 + ? = 10
  10. 10.56 + ? = 100
  11. 11.2 + ? = 10
  12. 12.1 + ? = 10
  13. 13.3 + ? = 10
  14. 14.53 + ? = 100
  15. 15.4 + ? = 10
  16. 16.73 + ? = 100
  17. 17.42 + ? = 100
  18. 18.46 + ? = 100
  19. 19.21 + ? = 100
  20. 20.61 + ? = 100
  21. 21.60 + ? = 100
  22. 22.88 + ? = 100
  23. 23.68 + ? = 100
  24. 24.79 + ? = 100
  25. 25.27 + ? = 100
  26. 26.14 + ? = 100
  27. 27.23 + ? = 100
  28. 28.70 + ? = 100
  29. 29.15 + ? = 100
  30. 30.76 + ? = 100
  31. 31.19 + ? = 100
  32. 32.37 + ? = 100
  33. 33.25 + ? = 100
  34. 34.18 + ? = 100
  35. 35.38 + ? = 100
  36. 36.17 + ? = 100
  37. 37.78 + ? = 100
  38. 38.74 + ? = 100
  39. 39.36 + ? = 100
  40. 40.29 + ? = 100

Answer key

  1. 5
  2. 3
  3. 18
  4. 43
  5. 89
  6. 87
  7. 4
  8. 31
  9. 1
  10. 44
  11. 8
  12. 9
  13. 7
  14. 47
  15. 6
  16. 27
  17. 58
  18. 54
  19. 79
  20. 39
  21. 40
  22. 12
  23. 32
  24. 21
  25. 73
  26. 86
  27. 77
  28. 30
  29. 85
  30. 24
  31. 81
  32. 63
  33. 75
  34. 82
  35. 62
  36. 83
  37. 22
  38. 26
  39. 64
  40. 71

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