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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 535 · 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. 1.22 + ? = 100
  2. 2.13 + ? = 100
  3. 3.5 + ? = 10
  4. 4.3 + ? = 10
  5. 5.1 + ? = 10
  6. 6.70 + ? = 100
  7. 7.54 + ? = 100
  8. 8.66 + ? = 100
  9. 9.32 + ? = 100
  10. 10.59 + ? = 100
  11. 11.77 + ? = 100
  12. 12.21 + ? = 100
  13. 13.9 + ? = 10
  14. 14.35 + ? = 100
  15. 15.73 + ? = 100
  16. 16.11 + ? = 100
  17. 17.8 + ? = 10
  18. 18.4 + ? = 10
  19. 19.45 + ? = 100
  20. 20.83 + ? = 100
  21. 21.88 + ? = 100
  22. 22.29 + ? = 100
  23. 23.86 + ? = 100
  24. 24.2 + ? = 10
  25. 25.30 + ? = 100
  26. 26.41 + ? = 100
  27. 27.53 + ? = 100
  28. 28.6 + ? = 10
  29. 29.79 + ? = 100
  30. 30.36 + ? = 100
  31. 31.40 + ? = 100
  32. 32.62 + ? = 100
  33. 33.18 + ? = 100
  34. 34.23 + ? = 100
  35. 35.46 + ? = 100
  36. 36.69 + ? = 100
  37. 37.19 + ? = 100
  38. 38.7 + ? = 10
  39. 39.87 + ? = 100
  40. 40.60 + ? = 100

Answer key

  1. 78
  2. 87
  3. 5
  4. 7
  5. 9
  6. 30
  7. 46
  8. 34
  9. 68
  10. 41
  11. 23
  12. 79
  13. 1
  14. 65
  15. 27
  16. 89
  17. 2
  18. 6
  19. 55
  20. 17
  21. 12
  22. 71
  23. 14
  24. 8
  25. 70
  26. 59
  27. 47
  28. 4
  29. 21
  30. 64
  31. 60
  32. 38
  33. 82
  34. 77
  35. 54
  36. 31
  37. 81
  38. 3
  39. 13
  40. 40

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