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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 716 · 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. 1.32 + ? = 100
  2. 2.8 + ? = 10
  3. 3.41 + ? = 100
  4. 4.3 + ? = 10
  5. 5.50 + ? = 100
  6. 6.1 + ? = 10
  7. 7.39 + ? = 100
  8. 8.62 + ? = 100
  9. 9.5 + ? = 10
  10. 10.54 + ? = 100
  11. 11.44 + ? = 100
  12. 12.35 + ? = 100
  13. 13.88 + ? = 100
  14. 14.25 + ? = 100
  15. 15.4 + ? = 10
  16. 16.64 + ? = 100
  17. 17.2 + ? = 10
  18. 18.28 + ? = 100
  19. 19.82 + ? = 100
  20. 20.9 + ? = 10
  21. 21.69 + ? = 100
  22. 22.29 + ? = 100
  23. 23.66 + ? = 100
  24. 24.7 + ? = 10
  25. 25.6 + ? = 10
  26. 26.21 + ? = 100
  27. 27.57 + ? = 100
  28. 28.79 + ? = 100
  29. 29.86 + ? = 100
  30. 30.61 + ? = 100
  31. 31.55 + ? = 100
  32. 32.33 + ? = 100
  33. 33.46 + ? = 100
  34. 34.15 + ? = 100
  35. 35.58 + ? = 100
  36. 36.60 + ? = 100
  37. 37.52 + ? = 100
  38. 38.71 + ? = 100
  39. 39.72 + ? = 100
  40. 40.36 + ? = 100

Answer key

  1. 68
  2. 2
  3. 59
  4. 7
  5. 50
  6. 9
  7. 61
  8. 38
  9. 5
  10. 46
  11. 56
  12. 65
  13. 12
  14. 75
  15. 6
  16. 36
  17. 8
  18. 72
  19. 18
  20. 1
  21. 31
  22. 71
  23. 34
  24. 3
  25. 4
  26. 79
  27. 43
  28. 21
  29. 14
  30. 39
  31. 45
  32. 67
  33. 54
  34. 85
  35. 42
  36. 40
  37. 48
  38. 29
  39. 28
  40. 64

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