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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 532 · 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. 2.23 + ? = 100
  3. 3.1 + ? = 10
  4. 4.11 + ? = 100
  5. 5.59 + ? = 100
  6. 6.2 + ? = 10
  7. 7.4 + ? = 10
  8. 8.26 + ? = 100
  9. 9.67 + ? = 100
  10. 10.7 + ? = 10
  11. 11.56 + ? = 100
  12. 12.9 + ? = 10
  13. 13.6 + ? = 10
  14. 14.42 + ? = 100
  15. 15.21 + ? = 100
  16. 16.57 + ? = 100
  17. 17.8 + ? = 10
  18. 18.47 + ? = 100
  19. 19.88 + ? = 100
  20. 20.61 + ? = 100
  21. 21.68 + ? = 100
  22. 22.75 + ? = 100
  23. 23.3 + ? = 10
  24. 24.69 + ? = 100
  25. 25.86 + ? = 100
  26. 26.18 + ? = 100
  27. 27.64 + ? = 100
  28. 28.30 + ? = 100
  29. 29.43 + ? = 100
  30. 30.14 + ? = 100
  31. 31.83 + ? = 100
  32. 32.78 + ? = 100
  33. 33.17 + ? = 100
  34. 34.20 + ? = 100
  35. 35.12 + ? = 100
  36. 36.72 + ? = 100
  37. 37.13 + ? = 100
  38. 38.19 + ? = 100
  39. 39.77 + ? = 100
  40. 40.84 + ? = 100

Answer key

  1. 5
  2. 77
  3. 9
  4. 89
  5. 41
  6. 8
  7. 6
  8. 74
  9. 33
  10. 3
  11. 44
  12. 1
  13. 4
  14. 58
  15. 79
  16. 43
  17. 2
  18. 53
  19. 12
  20. 39
  21. 32
  22. 25
  23. 7
  24. 31
  25. 14
  26. 82
  27. 36
  28. 70
  29. 57
  30. 86
  31. 17
  32. 22
  33. 83
  34. 80
  35. 88
  36. 28
  37. 87
  38. 81
  39. 23
  40. 16

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