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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 214 · 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. 1.54 + ? = 100
  2. 2.1 + ? = 10
  3. 3.2 + ? = 10
  4. 4.6 + ? = 10
  5. 5.3 + ? = 10
  6. 6.61 + ? = 100
  7. 7.4 + ? = 10
  8. 8.18 + ? = 100
  9. 9.82 + ? = 100
  10. 10.8 + ? = 10
  11. 11.86 + ? = 100
  12. 12.56 + ? = 100
  13. 13.29 + ? = 100
  14. 14.7 + ? = 10
  15. 15.88 + ? = 100
  16. 16.37 + ? = 100
  17. 17.57 + ? = 100
  18. 18.53 + ? = 100
  19. 19.9 + ? = 10
  20. 20.13 + ? = 100
  21. 21.68 + ? = 100
  22. 22.45 + ? = 100
  23. 23.5 + ? = 10
  24. 24.12 + ? = 100
  25. 25.14 + ? = 100
  26. 26.11 + ? = 100
  27. 27.59 + ? = 100
  28. 28.81 + ? = 100
  29. 29.33 + ? = 100
  30. 30.70 + ? = 100
  31. 31.30 + ? = 100
  32. 32.49 + ? = 100
  33. 33.87 + ? = 100
  34. 34.43 + ? = 100
  35. 35.17 + ? = 100
  36. 36.38 + ? = 100
  37. 37.20 + ? = 100
  38. 38.19 + ? = 100
  39. 39.42 + ? = 100
  40. 40.52 + ? = 100

Answer key

  1. 46
  2. 9
  3. 8
  4. 4
  5. 7
  6. 39
  7. 6
  8. 82
  9. 18
  10. 2
  11. 14
  12. 44
  13. 71
  14. 3
  15. 12
  16. 63
  17. 43
  18. 47
  19. 1
  20. 87
  21. 32
  22. 55
  23. 5
  24. 88
  25. 86
  26. 89
  27. 41
  28. 19
  29. 67
  30. 30
  31. 70
  32. 51
  33. 13
  34. 57
  35. 83
  36. 62
  37. 80
  38. 81
  39. 58
  40. 48

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