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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 589 · 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. 1.40 + ? = 100
  2. 2.4 + ? = 10
  3. 3.7 + ? = 10
  4. 4.62 + ? = 100
  5. 5.79 + ? = 100
  6. 6.16 + ? = 100
  7. 7.14 + ? = 100
  8. 8.15 + ? = 100
  9. 9.81 + ? = 100
  10. 10.5 + ? = 10
  11. 11.2 + ? = 10
  12. 12.84 + ? = 100
  13. 13.55 + ? = 100
  14. 14.3 + ? = 10
  15. 15.12 + ? = 100
  16. 16.8 + ? = 10
  17. 17.65 + ? = 100
  18. 18.68 + ? = 100
  19. 19.39 + ? = 100
  20. 20.78 + ? = 100
  21. 21.43 + ? = 100
  22. 22.83 + ? = 100
  23. 23.6 + ? = 10
  24. 24.33 + ? = 100
  25. 25.21 + ? = 100
  26. 26.56 + ? = 100
  27. 27.27 + ? = 100
  28. 28.9 + ? = 10
  29. 29.31 + ? = 100
  30. 30.23 + ? = 100
  31. 31.71 + ? = 100
  32. 32.32 + ? = 100
  33. 33.86 + ? = 100
  34. 34.63 + ? = 100
  35. 35.24 + ? = 100
  36. 36.69 + ? = 100
  37. 37.29 + ? = 100
  38. 38.17 + ? = 100
  39. 39.72 + ? = 100
  40. 40.58 + ? = 100

Answer key

  1. 60
  2. 6
  3. 3
  4. 38
  5. 21
  6. 84
  7. 86
  8. 85
  9. 19
  10. 5
  11. 8
  12. 16
  13. 45
  14. 7
  15. 88
  16. 2
  17. 35
  18. 32
  19. 61
  20. 22
  21. 57
  22. 17
  23. 4
  24. 67
  25. 79
  26. 44
  27. 73
  28. 1
  29. 69
  30. 77
  31. 29
  32. 68
  33. 14
  34. 37
  35. 76
  36. 31
  37. 71
  38. 83
  39. 28
  40. 42

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