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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 382 · 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. 1.7 + ? = 10
  2. 2.65 + ? = 100
  3. 3.8 + ? = 10
  4. 4.73 + ? = 100
  5. 5.32 + ? = 100
  6. 6.36 + ? = 100
  7. 7.5 + ? = 10
  8. 8.37 + ? = 100
  9. 9.1 + ? = 10
  10. 10.58 + ? = 100
  11. 11.24 + ? = 100
  12. 12.55 + ? = 100
  13. 13.41 + ? = 100
  14. 14.43 + ? = 100
  15. 15.4 + ? = 10
  16. 16.68 + ? = 100
  17. 17.83 + ? = 100
  18. 18.2 + ? = 10
  19. 19.48 + ? = 100
  20. 20.33 + ? = 100
  21. 21.38 + ? = 100
  22. 22.34 + ? = 100
  23. 23.71 + ? = 100
  24. 24.23 + ? = 100
  25. 25.26 + ? = 100
  26. 26.21 + ? = 100
  27. 27.22 + ? = 100
  28. 28.61 + ? = 100
  29. 29.52 + ? = 100
  30. 30.74 + ? = 100
  31. 31.64 + ? = 100
  32. 32.42 + ? = 100
  33. 33.89 + ? = 100
  34. 34.84 + ? = 100
  35. 35.86 + ? = 100
  36. 36.53 + ? = 100
  37. 37.39 + ? = 100
  38. 38.3 + ? = 10
  39. 39.57 + ? = 100
  40. 40.30 + ? = 100

Answer key

  1. 3
  2. 35
  3. 2
  4. 27
  5. 68
  6. 64
  7. 5
  8. 63
  9. 9
  10. 42
  11. 76
  12. 45
  13. 59
  14. 57
  15. 6
  16. 32
  17. 17
  18. 8
  19. 52
  20. 67
  21. 62
  22. 66
  23. 29
  24. 77
  25. 74
  26. 79
  27. 78
  28. 39
  29. 48
  30. 26
  31. 36
  32. 58
  33. 11
  34. 16
  35. 14
  36. 47
  37. 61
  38. 7
  39. 43
  40. 70

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