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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 390 · 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. 1.7 + ? = 10
  2. 2.70 + ? = 100
  3. 3.59 + ? = 100
  4. 4.43 + ? = 100
  5. 5.51 + ? = 100
  6. 6.8 + ? = 10
  7. 7.82 + ? = 100
  8. 8.64 + ? = 100
  9. 9.2 + ? = 10
  10. 10.83 + ? = 100
  11. 11.16 + ? = 100
  12. 12.1 + ? = 10
  13. 13.5 + ? = 10
  14. 14.30 + ? = 100
  15. 15.4 + ? = 10
  16. 16.28 + ? = 100
  17. 17.62 + ? = 100
  18. 18.31 + ? = 100
  19. 19.9 + ? = 10
  20. 20.13 + ? = 100
  21. 21.29 + ? = 100
  22. 22.3 + ? = 10
  23. 23.23 + ? = 100
  24. 24.80 + ? = 100
  25. 25.76 + ? = 100
  26. 26.41 + ? = 100
  27. 27.18 + ? = 100
  28. 28.27 + ? = 100
  29. 29.77 + ? = 100
  30. 30.75 + ? = 100
  31. 31.6 + ? = 10
  32. 32.54 + ? = 100
  33. 33.22 + ? = 100
  34. 34.19 + ? = 100
  35. 35.20 + ? = 100
  36. 36.14 + ? = 100
  37. 37.89 + ? = 100
  38. 38.85 + ? = 100
  39. 39.46 + ? = 100
  40. 40.81 + ? = 100

Answer key

  1. 3
  2. 30
  3. 41
  4. 57
  5. 49
  6. 2
  7. 18
  8. 36
  9. 8
  10. 17
  11. 84
  12. 9
  13. 5
  14. 70
  15. 6
  16. 72
  17. 38
  18. 69
  19. 1
  20. 87
  21. 71
  22. 7
  23. 77
  24. 20
  25. 24
  26. 59
  27. 82
  28. 73
  29. 23
  30. 25
  31. 4
  32. 46
  33. 78
  34. 81
  35. 80
  36. 86
  37. 11
  38. 15
  39. 54
  40. 19

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