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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 556 · 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. 2.17 + ? = 100
  3. 3.5 + ? = 10
  4. 4.88 + ? = 100
  5. 5.30 + ? = 100
  6. 6.83 + ? = 100
  7. 7.25 + ? = 100
  8. 8.7 + ? = 10
  9. 9.3 + ? = 10
  10. 10.8 + ? = 10
  11. 11.2 + ? = 10
  12. 12.1 + ? = 10
  13. 13.85 + ? = 100
  14. 14.79 + ? = 100
  15. 15.9 + ? = 10
  16. 16.37 + ? = 100
  17. 17.22 + ? = 100
  18. 18.39 + ? = 100
  19. 19.51 + ? = 100
  20. 20.68 + ? = 100
  21. 21.78 + ? = 100
  22. 22.29 + ? = 100
  23. 23.84 + ? = 100
  24. 24.21 + ? = 100
  25. 25.4 + ? = 10
  26. 26.59 + ? = 100
  27. 27.35 + ? = 100
  28. 28.40 + ? = 100
  29. 29.32 + ? = 100
  30. 30.36 + ? = 100
  31. 31.27 + ? = 100
  32. 32.46 + ? = 100
  33. 33.28 + ? = 100
  34. 34.31 + ? = 100
  35. 35.45 + ? = 100
  36. 36.13 + ? = 100
  37. 37.49 + ? = 100
  38. 38.19 + ? = 100
  39. 39.65 + ? = 100
  40. 40.43 + ? = 100

Answer key

  1. 4
  2. 83
  3. 5
  4. 12
  5. 70
  6. 17
  7. 75
  8. 3
  9. 7
  10. 2
  11. 8
  12. 9
  13. 15
  14. 21
  15. 1
  16. 63
  17. 78
  18. 61
  19. 49
  20. 32
  21. 22
  22. 71
  23. 16
  24. 79
  25. 6
  26. 41
  27. 65
  28. 60
  29. 68
  30. 64
  31. 73
  32. 54
  33. 72
  34. 69
  35. 55
  36. 87
  37. 51
  38. 81
  39. 35
  40. 57

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