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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 241 · 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. 2.43 + ? = 100
  3. 3.2 + ? = 10
  4. 4.72 + ? = 100
  5. 5.27 + ? = 100
  6. 6.22 + ? = 100
  7. 7.9 + ? = 10
  8. 8.16 + ? = 100
  9. 9.4 + ? = 10
  10. 10.19 + ? = 100
  11. 11.23 + ? = 100
  12. 12.54 + ? = 100
  13. 13.11 + ? = 100
  14. 14.77 + ? = 100
  15. 15.48 + ? = 100
  16. 16.7 + ? = 10
  17. 17.29 + ? = 100
  18. 18.89 + ? = 100
  19. 19.80 + ? = 100
  20. 20.1 + ? = 10
  21. 21.26 + ? = 100
  22. 22.59 + ? = 100
  23. 23.81 + ? = 100
  24. 24.3 + ? = 10
  25. 25.8 + ? = 10
  26. 26.5 + ? = 10
  27. 27.41 + ? = 100
  28. 28.18 + ? = 100
  29. 29.84 + ? = 100
  30. 30.45 + ? = 100
  31. 31.40 + ? = 100
  32. 32.49 + ? = 100
  33. 33.14 + ? = 100
  34. 34.83 + ? = 100
  35. 35.55 + ? = 100
  36. 36.13 + ? = 100
  37. 37.53 + ? = 100
  38. 38.62 + ? = 100
  39. 39.76 + ? = 100
  40. 40.71 + ? = 100

Answer key

  1. 4
  2. 57
  3. 8
  4. 28
  5. 73
  6. 78
  7. 1
  8. 84
  9. 6
  10. 81
  11. 77
  12. 46
  13. 89
  14. 23
  15. 52
  16. 3
  17. 71
  18. 11
  19. 20
  20. 9
  21. 74
  22. 41
  23. 19
  24. 7
  25. 2
  26. 5
  27. 59
  28. 82
  29. 16
  30. 55
  31. 60
  32. 51
  33. 86
  34. 17
  35. 45
  36. 87
  37. 47
  38. 38
  39. 24
  40. 29

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