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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 626 · 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. 1.8 + ? = 10
  2. 2.29 + ? = 100
  3. 3.71 + ? = 100
  4. 4.34 + ? = 100
  5. 5.22 + ? = 100
  6. 6.20 + ? = 100
  7. 7.18 + ? = 100
  8. 8.7 + ? = 10
  9. 9.55 + ? = 100
  10. 10.81 + ? = 100
  11. 11.28 + ? = 100
  12. 12.68 + ? = 100
  13. 13.3 + ? = 10
  14. 14.5 + ? = 10
  15. 15.2 + ? = 10
  16. 16.23 + ? = 100
  17. 17.46 + ? = 100
  18. 18.9 + ? = 10
  19. 19.1 + ? = 10
  20. 20.11 + ? = 100
  21. 21.40 + ? = 100
  22. 22.64 + ? = 100
  23. 23.36 + ? = 100
  24. 24.6 + ? = 10
  25. 25.42 + ? = 100
  26. 26.47 + ? = 100
  27. 27.17 + ? = 100
  28. 28.53 + ? = 100
  29. 29.31 + ? = 100
  30. 30.83 + ? = 100
  31. 31.69 + ? = 100
  32. 32.58 + ? = 100
  33. 33.80 + ? = 100
  34. 34.88 + ? = 100
  35. 35.78 + ? = 100
  36. 36.84 + ? = 100
  37. 37.51 + ? = 100
  38. 38.25 + ? = 100
  39. 39.52 + ? = 100
  40. 40.45 + ? = 100

Answer key

  1. 2
  2. 71
  3. 29
  4. 66
  5. 78
  6. 80
  7. 82
  8. 3
  9. 45
  10. 19
  11. 72
  12. 32
  13. 7
  14. 5
  15. 8
  16. 77
  17. 54
  18. 1
  19. 9
  20. 89
  21. 60
  22. 36
  23. 64
  24. 4
  25. 58
  26. 53
  27. 83
  28. 47
  29. 69
  30. 17
  31. 31
  32. 42
  33. 20
  34. 12
  35. 22
  36. 16
  37. 49
  38. 75
  39. 48
  40. 55

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