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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 463 · 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. 1.28 + ? = 100
  2. 2.44 + ? = 100
  3. 3.48 + ? = 100
  4. 4.6 + ? = 10
  5. 5.83 + ? = 100
  6. 6.1 + ? = 10
  7. 7.70 + ? = 100
  8. 8.52 + ? = 100
  9. 9.72 + ? = 100
  10. 10.88 + ? = 100
  11. 11.19 + ? = 100
  12. 12.14 + ? = 100
  13. 13.82 + ? = 100
  14. 14.80 + ? = 100
  15. 15.12 + ? = 100
  16. 16.71 + ? = 100
  17. 17.4 + ? = 10
  18. 18.8 + ? = 10
  19. 19.53 + ? = 100
  20. 20.57 + ? = 100
  21. 21.2 + ? = 10
  22. 22.59 + ? = 100
  23. 23.76 + ? = 100
  24. 24.39 + ? = 100
  25. 25.7 + ? = 10
  26. 26.60 + ? = 100
  27. 27.63 + ? = 100
  28. 28.27 + ? = 100
  29. 29.5 + ? = 10
  30. 30.78 + ? = 100
  31. 31.9 + ? = 10
  32. 32.36 + ? = 100
  33. 33.41 + ? = 100
  34. 34.21 + ? = 100
  35. 35.3 + ? = 10
  36. 36.35 + ? = 100
  37. 37.33 + ? = 100
  38. 38.66 + ? = 100
  39. 39.50 + ? = 100
  40. 40.42 + ? = 100

Answer key

  1. 72
  2. 56
  3. 52
  4. 4
  5. 17
  6. 9
  7. 30
  8. 48
  9. 28
  10. 12
  11. 81
  12. 86
  13. 18
  14. 20
  15. 88
  16. 29
  17. 6
  18. 2
  19. 47
  20. 43
  21. 8
  22. 41
  23. 24
  24. 61
  25. 3
  26. 40
  27. 37
  28. 73
  29. 5
  30. 22
  31. 1
  32. 64
  33. 59
  34. 79
  35. 7
  36. 65
  37. 67
  38. 34
  39. 50
  40. 58

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