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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 709 · 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. 1.15 + ? = 100
  2. 2.44 + ? = 100
  3. 3.4 + ? = 10
  4. 4.9 + ? = 10
  5. 5.69 + ? = 100
  6. 6.2 + ? = 10
  7. 7.79 + ? = 100
  8. 8.3 + ? = 10
  9. 9.61 + ? = 100
  10. 10.5 + ? = 10
  11. 11.14 + ? = 100
  12. 12.6 + ? = 10
  13. 13.1 + ? = 10
  14. 14.70 + ? = 100
  15. 15.7 + ? = 10
  16. 16.58 + ? = 100
  17. 17.66 + ? = 100
  18. 18.39 + ? = 100
  19. 19.27 + ? = 100
  20. 20.54 + ? = 100
  21. 21.8 + ? = 10
  22. 22.86 + ? = 100
  23. 23.22 + ? = 100
  24. 24.48 + ? = 100
  25. 25.52 + ? = 100
  26. 26.13 + ? = 100
  27. 27.19 + ? = 100
  28. 28.62 + ? = 100
  29. 29.43 + ? = 100
  30. 30.64 + ? = 100
  31. 31.80 + ? = 100
  32. 32.75 + ? = 100
  33. 33.45 + ? = 100
  34. 34.73 + ? = 100
  35. 35.46 + ? = 100
  36. 36.72 + ? = 100
  37. 37.84 + ? = 100
  38. 38.40 + ? = 100
  39. 39.24 + ? = 100
  40. 40.37 + ? = 100

Answer key

  1. 85
  2. 56
  3. 6
  4. 1
  5. 31
  6. 8
  7. 21
  8. 7
  9. 39
  10. 5
  11. 86
  12. 4
  13. 9
  14. 30
  15. 3
  16. 42
  17. 34
  18. 61
  19. 73
  20. 46
  21. 2
  22. 14
  23. 78
  24. 52
  25. 48
  26. 87
  27. 81
  28. 38
  29. 57
  30. 36
  31. 20
  32. 25
  33. 55
  34. 27
  35. 54
  36. 28
  37. 16
  38. 60
  39. 76
  40. 63

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