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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 482 · 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. 1.2 + ? = 10
  2. 2.36 + ? = 100
  3. 3.6 + ? = 10
  4. 4.60 + ? = 100
  5. 5.17 + ? = 100
  6. 6.9 + ? = 10
  7. 7.76 + ? = 100
  8. 8.55 + ? = 100
  9. 9.31 + ? = 100
  10. 10.51 + ? = 100
  11. 11.1 + ? = 10
  12. 12.68 + ? = 100
  13. 13.66 + ? = 100
  14. 14.83 + ? = 100
  15. 15.19 + ? = 100
  16. 16.8 + ? = 10
  17. 17.63 + ? = 100
  18. 18.3 + ? = 10
  19. 19.7 + ? = 10
  20. 20.4 + ? = 10
  21. 21.47 + ? = 100
  22. 22.88 + ? = 100
  23. 23.21 + ? = 100
  24. 24.86 + ? = 100
  25. 25.41 + ? = 100
  26. 26.24 + ? = 100
  27. 27.38 + ? = 100
  28. 28.43 + ? = 100
  29. 29.61 + ? = 100
  30. 30.20 + ? = 100
  31. 31.12 + ? = 100
  32. 32.16 + ? = 100
  33. 33.5 + ? = 10
  34. 34.48 + ? = 100
  35. 35.52 + ? = 100
  36. 36.89 + ? = 100
  37. 37.26 + ? = 100
  38. 38.18 + ? = 100
  39. 39.37 + ? = 100
  40. 40.82 + ? = 100

Answer key

  1. 8
  2. 64
  3. 4
  4. 40
  5. 83
  6. 1
  7. 24
  8. 45
  9. 69
  10. 49
  11. 9
  12. 32
  13. 34
  14. 17
  15. 81
  16. 2
  17. 37
  18. 7
  19. 3
  20. 6
  21. 53
  22. 12
  23. 79
  24. 14
  25. 59
  26. 76
  27. 62
  28. 57
  29. 39
  30. 80
  31. 88
  32. 84
  33. 5
  34. 52
  35. 48
  36. 11
  37. 74
  38. 82
  39. 63
  40. 18

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