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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 464 · 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. 1.42 + ? = 100
  2. 2.15 + ? = 100
  3. 3.58 + ? = 100
  4. 4.4 + ? = 10
  5. 5.2 + ? = 10
  6. 6.5 + ? = 10
  7. 7.8 + ? = 10
  8. 8.83 + ? = 100
  9. 9.38 + ? = 100
  10. 10.3 + ? = 10
  11. 11.9 + ? = 10
  12. 12.88 + ? = 100
  13. 13.1 + ? = 10
  14. 14.46 + ? = 100
  15. 15.7 + ? = 10
  16. 16.62 + ? = 100
  17. 17.67 + ? = 100
  18. 18.71 + ? = 100
  19. 19.34 + ? = 100
  20. 20.24 + ? = 100
  21. 21.56 + ? = 100
  22. 22.72 + ? = 100
  23. 23.86 + ? = 100
  24. 24.54 + ? = 100
  25. 25.70 + ? = 100
  26. 26.13 + ? = 100
  27. 27.28 + ? = 100
  28. 28.6 + ? = 10
  29. 29.40 + ? = 100
  30. 30.43 + ? = 100
  31. 31.47 + ? = 100
  32. 32.23 + ? = 100
  33. 33.25 + ? = 100
  34. 34.14 + ? = 100
  35. 35.80 + ? = 100
  36. 36.12 + ? = 100
  37. 37.66 + ? = 100
  38. 38.65 + ? = 100
  39. 39.82 + ? = 100
  40. 40.63 + ? = 100

Answer key

  1. 58
  2. 85
  3. 42
  4. 6
  5. 8
  6. 5
  7. 2
  8. 17
  9. 62
  10. 7
  11. 1
  12. 12
  13. 9
  14. 54
  15. 3
  16. 38
  17. 33
  18. 29
  19. 66
  20. 76
  21. 44
  22. 28
  23. 14
  24. 46
  25. 30
  26. 87
  27. 72
  28. 4
  29. 60
  30. 57
  31. 53
  32. 77
  33. 75
  34. 86
  35. 20
  36. 88
  37. 34
  38. 35
  39. 18
  40. 37

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