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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 319 · 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. 1.1 + ? = 10
  2. 2.52 + ? = 100
  3. 3.78 + ? = 100
  4. 4.28 + ? = 100
  5. 5.8 + ? = 10
  6. 6.74 + ? = 100
  7. 7.4 + ? = 10
  8. 8.20 + ? = 100
  9. 9.47 + ? = 100
  10. 10.2 + ? = 10
  11. 11.42 + ? = 100
  12. 12.16 + ? = 100
  13. 13.60 + ? = 100
  14. 14.24 + ? = 100
  15. 15.9 + ? = 10
  16. 16.5 + ? = 10
  17. 17.82 + ? = 100
  18. 18.3 + ? = 10
  19. 19.46 + ? = 100
  20. 20.23 + ? = 100
  21. 21.7 + ? = 10
  22. 22.62 + ? = 100
  23. 23.58 + ? = 100
  24. 24.38 + ? = 100
  25. 25.17 + ? = 100
  26. 26.89 + ? = 100
  27. 27.22 + ? = 100
  28. 28.86 + ? = 100
  29. 29.56 + ? = 100
  30. 30.68 + ? = 100
  31. 31.37 + ? = 100
  32. 32.13 + ? = 100
  33. 33.6 + ? = 10
  34. 34.57 + ? = 100
  35. 35.88 + ? = 100
  36. 36.39 + ? = 100
  37. 37.27 + ? = 100
  38. 38.32 + ? = 100
  39. 39.26 + ? = 100
  40. 40.65 + ? = 100

Answer key

  1. 9
  2. 48
  3. 22
  4. 72
  5. 2
  6. 26
  7. 6
  8. 80
  9. 53
  10. 8
  11. 58
  12. 84
  13. 40
  14. 76
  15. 1
  16. 5
  17. 18
  18. 7
  19. 54
  20. 77
  21. 3
  22. 38
  23. 42
  24. 62
  25. 83
  26. 11
  27. 78
  28. 14
  29. 44
  30. 32
  31. 63
  32. 87
  33. 4
  34. 43
  35. 12
  36. 61
  37. 73
  38. 68
  39. 74
  40. 35

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