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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 496 · 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. 1.63 + ? = 100
  2. 2.8 + ? = 10
  3. 3.87 + ? = 100
  4. 4.19 + ? = 100
  5. 5.48 + ? = 100
  6. 6.6 + ? = 10
  7. 7.4 + ? = 10
  8. 8.80 + ? = 100
  9. 9.5 + ? = 10
  10. 10.9 + ? = 10
  11. 11.69 + ? = 100
  12. 12.7 + ? = 10
  13. 13.68 + ? = 100
  14. 14.1 + ? = 10
  15. 15.53 + ? = 100
  16. 16.3 + ? = 10
  17. 17.65 + ? = 100
  18. 18.40 + ? = 100
  19. 19.13 + ? = 100
  20. 20.39 + ? = 100
  21. 21.55 + ? = 100
  22. 22.32 + ? = 100
  23. 23.31 + ? = 100
  24. 24.52 + ? = 100
  25. 25.37 + ? = 100
  26. 26.41 + ? = 100
  27. 27.15 + ? = 100
  28. 28.17 + ? = 100
  29. 29.25 + ? = 100
  30. 30.70 + ? = 100
  31. 31.78 + ? = 100
  32. 32.2 + ? = 10
  33. 33.47 + ? = 100
  34. 34.84 + ? = 100
  35. 35.44 + ? = 100
  36. 36.43 + ? = 100
  37. 37.28 + ? = 100
  38. 38.24 + ? = 100
  39. 39.82 + ? = 100
  40. 40.12 + ? = 100

Answer key

  1. 37
  2. 2
  3. 13
  4. 81
  5. 52
  6. 4
  7. 6
  8. 20
  9. 5
  10. 1
  11. 31
  12. 3
  13. 32
  14. 9
  15. 47
  16. 7
  17. 35
  18. 60
  19. 87
  20. 61
  21. 45
  22. 68
  23. 69
  24. 48
  25. 63
  26. 59
  27. 85
  28. 83
  29. 75
  30. 30
  31. 22
  32. 8
  33. 53
  34. 16
  35. 56
  36. 57
  37. 72
  38. 76
  39. 18
  40. 88

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