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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 33 · 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. 1.14 + ? = 100
  2. 2.1 + ? = 10
  3. 3.70 + ? = 100
  4. 4.85 + ? = 100
  5. 5.7 + ? = 10
  6. 6.52 + ? = 100
  7. 7.87 + ? = 100
  8. 8.55 + ? = 100
  9. 9.49 + ? = 100
  10. 10.78 + ? = 100
  11. 11.63 + ? = 100
  12. 12.25 + ? = 100
  13. 13.5 + ? = 10
  14. 14.65 + ? = 100
  15. 15.69 + ? = 100
  16. 16.9 + ? = 10
  17. 17.38 + ? = 100
  18. 18.31 + ? = 100
  19. 19.3 + ? = 10
  20. 20.8 + ? = 10
  21. 21.4 + ? = 10
  22. 22.28 + ? = 100
  23. 23.15 + ? = 100
  24. 24.36 + ? = 100
  25. 25.2 + ? = 10
  26. 26.23 + ? = 100
  27. 27.88 + ? = 100
  28. 28.46 + ? = 100
  29. 29.24 + ? = 100
  30. 30.59 + ? = 100
  31. 31.58 + ? = 100
  32. 32.54 + ? = 100
  33. 33.6 + ? = 10
  34. 34.20 + ? = 100
  35. 35.43 + ? = 100
  36. 36.33 + ? = 100
  37. 37.34 + ? = 100
  38. 38.72 + ? = 100
  39. 39.66 + ? = 100
  40. 40.18 + ? = 100

Answer key

  1. 86
  2. 9
  3. 30
  4. 15
  5. 3
  6. 48
  7. 13
  8. 45
  9. 51
  10. 22
  11. 37
  12. 75
  13. 5
  14. 35
  15. 31
  16. 1
  17. 62
  18. 69
  19. 7
  20. 2
  21. 6
  22. 72
  23. 85
  24. 64
  25. 8
  26. 77
  27. 12
  28. 54
  29. 76
  30. 41
  31. 42
  32. 46
  33. 4
  34. 80
  35. 57
  36. 67
  37. 66
  38. 28
  39. 34
  40. 82

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