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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 594 · 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. 1.70 + ? = 100
  2. 2.25 + ? = 100
  3. 3.7 + ? = 10
  4. 4.27 + ? = 100
  5. 5.16 + ? = 100
  6. 6.8 + ? = 10
  7. 7.60 + ? = 100
  8. 8.89 + ? = 100
  9. 9.9 + ? = 10
  10. 10.48 + ? = 100
  11. 11.4 + ? = 10
  12. 12.37 + ? = 100
  13. 13.2 + ? = 10
  14. 14.69 + ? = 100
  15. 15.3 + ? = 10
  16. 16.86 + ? = 100
  17. 17.58 + ? = 100
  18. 18.15 + ? = 100
  19. 19.5 + ? = 10
  20. 20.54 + ? = 100
  21. 21.85 + ? = 100
  22. 22.47 + ? = 100
  23. 23.29 + ? = 100
  24. 24.44 + ? = 100
  25. 25.80 + ? = 100
  26. 26.6 + ? = 10
  27. 27.79 + ? = 100
  28. 28.59 + ? = 100
  29. 29.1 + ? = 10
  30. 30.49 + ? = 100
  31. 31.18 + ? = 100
  32. 32.84 + ? = 100
  33. 33.76 + ? = 100
  34. 34.83 + ? = 100
  35. 35.11 + ? = 100
  36. 36.73 + ? = 100
  37. 37.19 + ? = 100
  38. 38.63 + ? = 100
  39. 39.32 + ? = 100
  40. 40.12 + ? = 100

Answer key

  1. 30
  2. 75
  3. 3
  4. 73
  5. 84
  6. 2
  7. 40
  8. 11
  9. 1
  10. 52
  11. 6
  12. 63
  13. 8
  14. 31
  15. 7
  16. 14
  17. 42
  18. 85
  19. 5
  20. 46
  21. 15
  22. 53
  23. 71
  24. 56
  25. 20
  26. 4
  27. 21
  28. 41
  29. 9
  30. 51
  31. 82
  32. 16
  33. 24
  34. 17
  35. 89
  36. 27
  37. 81
  38. 37
  39. 68
  40. 88

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