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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 116 · 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. 1.35 + ? = 100
  2. 2.7 + ? = 10
  3. 3.21 + ? = 100
  4. 4.5 + ? = 10
  5. 5.6 + ? = 10
  6. 6.41 + ? = 100
  7. 7.73 + ? = 100
  8. 8.88 + ? = 100
  9. 9.1 + ? = 10
  10. 10.34 + ? = 100
  11. 11.79 + ? = 100
  12. 12.39 + ? = 100
  13. 13.29 + ? = 100
  14. 14.3 + ? = 10
  15. 15.86 + ? = 100
  16. 16.87 + ? = 100
  17. 17.85 + ? = 100
  18. 18.62 + ? = 100
  19. 19.59 + ? = 100
  20. 20.76 + ? = 100
  21. 21.8 + ? = 10
  22. 22.84 + ? = 100
  23. 23.52 + ? = 100
  24. 24.45 + ? = 100
  25. 25.40 + ? = 100
  26. 26.22 + ? = 100
  27. 27.2 + ? = 10
  28. 28.4 + ? = 10
  29. 29.57 + ? = 100
  30. 30.78 + ? = 100
  31. 31.54 + ? = 100
  32. 32.56 + ? = 100
  33. 33.32 + ? = 100
  34. 34.13 + ? = 100
  35. 35.65 + ? = 100
  36. 36.9 + ? = 10
  37. 37.58 + ? = 100
  38. 38.83 + ? = 100
  39. 39.27 + ? = 100
  40. 40.18 + ? = 100

Answer key

  1. 65
  2. 3
  3. 79
  4. 5
  5. 4
  6. 59
  7. 27
  8. 12
  9. 9
  10. 66
  11. 21
  12. 61
  13. 71
  14. 7
  15. 14
  16. 13
  17. 15
  18. 38
  19. 41
  20. 24
  21. 2
  22. 16
  23. 48
  24. 55
  25. 60
  26. 78
  27. 8
  28. 6
  29. 43
  30. 22
  31. 46
  32. 44
  33. 68
  34. 87
  35. 35
  36. 1
  37. 42
  38. 17
  39. 73
  40. 82

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