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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 383 · 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. 2.14 + ? = 100
  3. 3.3 + ? = 10
  4. 4.5 + ? = 10
  5. 5.76 + ? = 100
  6. 6.72 + ? = 100
  7. 7.9 + ? = 10
  8. 8.17 + ? = 100
  9. 9.87 + ? = 100
  10. 10.4 + ? = 10
  11. 11.22 + ? = 100
  12. 12.11 + ? = 100
  13. 13.84 + ? = 100
  14. 14.13 + ? = 100
  15. 15.1 + ? = 10
  16. 16.21 + ? = 100
  17. 17.8 + ? = 10
  18. 18.52 + ? = 100
  19. 19.47 + ? = 100
  20. 20.27 + ? = 100
  21. 21.6 + ? = 10
  22. 22.39 + ? = 100
  23. 23.75 + ? = 100
  24. 24.85 + ? = 100
  25. 25.33 + ? = 100
  26. 26.36 + ? = 100
  27. 27.83 + ? = 100
  28. 28.35 + ? = 100
  29. 29.62 + ? = 100
  30. 30.37 + ? = 100
  31. 31.45 + ? = 100
  32. 32.65 + ? = 100
  33. 33.58 + ? = 100
  34. 34.38 + ? = 100
  35. 35.78 + ? = 100
  36. 36.30 + ? = 100
  37. 37.55 + ? = 100
  38. 38.43 + ? = 100
  39. 39.24 + ? = 100
  40. 40.86 + ? = 100

Answer key

  1. 8
  2. 86
  3. 7
  4. 5
  5. 24
  6. 28
  7. 1
  8. 83
  9. 13
  10. 6
  11. 78
  12. 89
  13. 16
  14. 87
  15. 9
  16. 79
  17. 2
  18. 48
  19. 53
  20. 73
  21. 4
  22. 61
  23. 25
  24. 15
  25. 67
  26. 64
  27. 17
  28. 65
  29. 38
  30. 63
  31. 55
  32. 35
  33. 42
  34. 62
  35. 22
  36. 70
  37. 45
  38. 57
  39. 76
  40. 14

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