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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 396 · 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. 1.52 + ? = 100
  2. 2.28 + ? = 100
  3. 3.3 + ? = 10
  4. 4.53 + ? = 100
  5. 5.34 + ? = 100
  6. 6.2 + ? = 10
  7. 7.73 + ? = 100
  8. 8.24 + ? = 100
  9. 9.7 + ? = 10
  10. 10.1 + ? = 10
  11. 11.15 + ? = 100
  12. 12.6 + ? = 10
  13. 13.36 + ? = 100
  14. 14.64 + ? = 100
  15. 15.32 + ? = 100
  16. 16.87 + ? = 100
  17. 17.55 + ? = 100
  18. 18.5 + ? = 10
  19. 19.14 + ? = 100
  20. 20.8 + ? = 10
  21. 21.86 + ? = 100
  22. 22.23 + ? = 100
  23. 23.58 + ? = 100
  24. 24.78 + ? = 100
  25. 25.62 + ? = 100
  26. 26.46 + ? = 100
  27. 27.70 + ? = 100
  28. 28.51 + ? = 100
  29. 29.59 + ? = 100
  30. 30.83 + ? = 100
  31. 31.4 + ? = 10
  32. 32.9 + ? = 10
  33. 33.26 + ? = 100
  34. 34.29 + ? = 100
  35. 35.66 + ? = 100
  36. 36.49 + ? = 100
  37. 37.88 + ? = 100
  38. 38.42 + ? = 100
  39. 39.41 + ? = 100
  40. 40.71 + ? = 100

Answer key

  1. 48
  2. 72
  3. 7
  4. 47
  5. 66
  6. 8
  7. 27
  8. 76
  9. 3
  10. 9
  11. 85
  12. 4
  13. 64
  14. 36
  15. 68
  16. 13
  17. 45
  18. 5
  19. 86
  20. 2
  21. 14
  22. 77
  23. 42
  24. 22
  25. 38
  26. 54
  27. 30
  28. 49
  29. 41
  30. 17
  31. 6
  32. 1
  33. 74
  34. 71
  35. 34
  36. 51
  37. 12
  38. 58
  39. 59
  40. 29

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