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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 294 · 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. 1.44 + ? = 100
  2. 2.63 + ? = 100
  3. 3.69 + ? = 100
  4. 4.49 + ? = 100
  5. 5.8 + ? = 10
  6. 6.12 + ? = 100
  7. 7.5 + ? = 10
  8. 8.3 + ? = 10
  9. 9.4 + ? = 10
  10. 10.42 + ? = 100
  11. 11.1 + ? = 10
  12. 12.79 + ? = 100
  13. 13.9 + ? = 10
  14. 14.77 + ? = 100
  15. 15.41 + ? = 100
  16. 16.28 + ? = 100
  17. 17.47 + ? = 100
  18. 18.13 + ? = 100
  19. 19.27 + ? = 100
  20. 20.62 + ? = 100
  21. 21.82 + ? = 100
  22. 22.48 + ? = 100
  23. 23.72 + ? = 100
  24. 24.35 + ? = 100
  25. 25.32 + ? = 100
  26. 26.6 + ? = 10
  27. 27.51 + ? = 100
  28. 28.7 + ? = 10
  29. 29.68 + ? = 100
  30. 30.17 + ? = 100
  31. 31.53 + ? = 100
  32. 32.59 + ? = 100
  33. 33.88 + ? = 100
  34. 34.16 + ? = 100
  35. 35.61 + ? = 100
  36. 36.87 + ? = 100
  37. 37.22 + ? = 100
  38. 38.58 + ? = 100
  39. 39.55 + ? = 100
  40. 40.84 + ? = 100

Answer key

  1. 56
  2. 37
  3. 31
  4. 51
  5. 2
  6. 88
  7. 5
  8. 7
  9. 6
  10. 58
  11. 9
  12. 21
  13. 1
  14. 23
  15. 59
  16. 72
  17. 53
  18. 87
  19. 73
  20. 38
  21. 18
  22. 52
  23. 28
  24. 65
  25. 68
  26. 4
  27. 49
  28. 3
  29. 32
  30. 83
  31. 47
  32. 41
  33. 12
  34. 84
  35. 39
  36. 13
  37. 78
  38. 42
  39. 45
  40. 16

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