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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 649 · 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. 1.1 + ? = 10
  2. 2.68 + ? = 100
  3. 3.5 + ? = 10
  4. 4.8 + ? = 10
  5. 5.19 + ? = 100
  6. 6.56 + ? = 100
  7. 7.69 + ? = 100
  8. 8.23 + ? = 100
  9. 9.9 + ? = 10
  10. 10.74 + ? = 100
  11. 11.61 + ? = 100
  12. 12.17 + ? = 100
  13. 13.39 + ? = 100
  14. 14.82 + ? = 100
  15. 15.62 + ? = 100
  16. 16.27 + ? = 100
  17. 17.7 + ? = 10
  18. 18.3 + ? = 10
  19. 19.34 + ? = 100
  20. 20.72 + ? = 100
  21. 21.4 + ? = 10
  22. 22.85 + ? = 100
  23. 23.14 + ? = 100
  24. 24.2 + ? = 10
  25. 25.36 + ? = 100
  26. 26.30 + ? = 100
  27. 27.71 + ? = 100
  28. 28.84 + ? = 100
  29. 29.86 + ? = 100
  30. 30.28 + ? = 100
  31. 31.42 + ? = 100
  32. 32.25 + ? = 100
  33. 33.20 + ? = 100
  34. 34.35 + ? = 100
  35. 35.6 + ? = 10
  36. 36.53 + ? = 100
  37. 37.15 + ? = 100
  38. 38.11 + ? = 100
  39. 39.29 + ? = 100
  40. 40.26 + ? = 100

Answer key

  1. 9
  2. 32
  3. 5
  4. 2
  5. 81
  6. 44
  7. 31
  8. 77
  9. 1
  10. 26
  11. 39
  12. 83
  13. 61
  14. 18
  15. 38
  16. 73
  17. 3
  18. 7
  19. 66
  20. 28
  21. 6
  22. 15
  23. 86
  24. 8
  25. 64
  26. 70
  27. 29
  28. 16
  29. 14
  30. 72
  31. 58
  32. 75
  33. 80
  34. 65
  35. 4
  36. 47
  37. 85
  38. 89
  39. 71
  40. 74

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