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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 703 · 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. 1.6 + ? = 10
  2. 2.71 + ? = 100
  3. 3.44 + ? = 100
  4. 4.5 + ? = 10
  5. 5.7 + ? = 10
  6. 6.24 + ? = 100
  7. 7.13 + ? = 100
  8. 8.1 + ? = 10
  9. 9.2 + ? = 10
  10. 10.76 + ? = 100
  11. 11.8 + ? = 10
  12. 12.68 + ? = 100
  13. 13.23 + ? = 100
  14. 14.21 + ? = 100
  15. 15.4 + ? = 10
  16. 16.53 + ? = 100
  17. 17.34 + ? = 100
  18. 18.64 + ? = 100
  19. 19.72 + ? = 100
  20. 20.11 + ? = 100
  21. 21.42 + ? = 100
  22. 22.69 + ? = 100
  23. 23.70 + ? = 100
  24. 24.82 + ? = 100
  25. 25.3 + ? = 10
  26. 26.9 + ? = 10
  27. 27.74 + ? = 100
  28. 28.19 + ? = 100
  29. 29.48 + ? = 100
  30. 30.86 + ? = 100
  31. 31.67 + ? = 100
  32. 32.25 + ? = 100
  33. 33.28 + ? = 100
  34. 34.65 + ? = 100
  35. 35.79 + ? = 100
  36. 36.17 + ? = 100
  37. 37.81 + ? = 100
  38. 38.33 + ? = 100
  39. 39.87 + ? = 100
  40. 40.29 + ? = 100

Answer key

  1. 4
  2. 29
  3. 56
  4. 5
  5. 3
  6. 76
  7. 87
  8. 9
  9. 8
  10. 24
  11. 2
  12. 32
  13. 77
  14. 79
  15. 6
  16. 47
  17. 66
  18. 36
  19. 28
  20. 89
  21. 58
  22. 31
  23. 30
  24. 18
  25. 7
  26. 1
  27. 26
  28. 81
  29. 52
  30. 14
  31. 33
  32. 75
  33. 72
  34. 35
  35. 21
  36. 83
  37. 19
  38. 67
  39. 13
  40. 71

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