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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 505 · 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. 1.16 + ? = 100
  2. 2.17 + ? = 100
  3. 3.46 + ? = 100
  4. 4.11 + ? = 100
  5. 5.52 + ? = 100
  6. 6.6 + ? = 10
  7. 7.36 + ? = 100
  8. 8.8 + ? = 10
  9. 9.9 + ? = 10
  10. 10.18 + ? = 100
  11. 11.1 + ? = 10
  12. 12.86 + ? = 100
  13. 13.5 + ? = 10
  14. 14.57 + ? = 100
  15. 15.68 + ? = 100
  16. 16.2 + ? = 10
  17. 17.71 + ? = 100
  18. 18.4 + ? = 10
  19. 19.51 + ? = 100
  20. 20.89 + ? = 100
  21. 21.24 + ? = 100
  22. 22.25 + ? = 100
  23. 23.31 + ? = 100
  24. 24.53 + ? = 100
  25. 25.73 + ? = 100
  26. 26.84 + ? = 100
  27. 27.64 + ? = 100
  28. 28.7 + ? = 10
  29. 29.29 + ? = 100
  30. 30.43 + ? = 100
  31. 31.34 + ? = 100
  32. 32.33 + ? = 100
  33. 33.82 + ? = 100
  34. 34.62 + ? = 100
  35. 35.79 + ? = 100
  36. 36.88 + ? = 100
  37. 37.3 + ? = 10
  38. 38.20 + ? = 100
  39. 39.78 + ? = 100
  40. 40.41 + ? = 100

Answer key

  1. 84
  2. 83
  3. 54
  4. 89
  5. 48
  6. 4
  7. 64
  8. 2
  9. 1
  10. 82
  11. 9
  12. 14
  13. 5
  14. 43
  15. 32
  16. 8
  17. 29
  18. 6
  19. 49
  20. 11
  21. 76
  22. 75
  23. 69
  24. 47
  25. 27
  26. 16
  27. 36
  28. 3
  29. 71
  30. 57
  31. 66
  32. 67
  33. 18
  34. 38
  35. 21
  36. 12
  37. 7
  38. 80
  39. 22
  40. 59

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