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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 378 · 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. 1.23 + ? = 100
  2. 2.9 + ? = 10
  3. 3.60 + ? = 100
  4. 4.3 + ? = 10
  5. 5.63 + ? = 100
  6. 6.65 + ? = 100
  7. 7.1 + ? = 10
  8. 8.11 + ? = 100
  9. 9.84 + ? = 100
  10. 10.29 + ? = 100
  11. 11.8 + ? = 10
  12. 12.17 + ? = 100
  13. 13.2 + ? = 10
  14. 14.56 + ? = 100
  15. 15.26 + ? = 100
  16. 16.5 + ? = 10
  17. 17.16 + ? = 100
  18. 18.6 + ? = 10
  19. 19.80 + ? = 100
  20. 20.74 + ? = 100
  21. 21.13 + ? = 100
  22. 22.4 + ? = 10
  23. 23.53 + ? = 100
  24. 24.78 + ? = 100
  25. 25.86 + ? = 100
  26. 26.7 + ? = 10
  27. 27.25 + ? = 100
  28. 28.42 + ? = 100
  29. 29.67 + ? = 100
  30. 30.72 + ? = 100
  31. 31.85 + ? = 100
  32. 32.61 + ? = 100
  33. 33.18 + ? = 100
  34. 34.48 + ? = 100
  35. 35.59 + ? = 100
  36. 36.71 + ? = 100
  37. 37.58 + ? = 100
  38. 38.47 + ? = 100
  39. 39.38 + ? = 100
  40. 40.31 + ? = 100

Answer key

  1. 77
  2. 1
  3. 40
  4. 7
  5. 37
  6. 35
  7. 9
  8. 89
  9. 16
  10. 71
  11. 2
  12. 83
  13. 8
  14. 44
  15. 74
  16. 5
  17. 84
  18. 4
  19. 20
  20. 26
  21. 87
  22. 6
  23. 47
  24. 22
  25. 14
  26. 3
  27. 75
  28. 58
  29. 33
  30. 28
  31. 15
  32. 39
  33. 82
  34. 52
  35. 41
  36. 29
  37. 42
  38. 53
  39. 62
  40. 69

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