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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 566 · 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. 1.84 + ? = 100
  2. 2.6 + ? = 10
  3. 3.63 + ? = 100
  4. 4.49 + ? = 100
  5. 5.86 + ? = 100
  6. 6.40 + ? = 100
  7. 7.73 + ? = 100
  8. 8.62 + ? = 100
  9. 9.74 + ? = 100
  10. 10.3 + ? = 10
  11. 11.9 + ? = 10
  12. 12.28 + ? = 100
  13. 13.71 + ? = 100
  14. 14.2 + ? = 10
  15. 15.23 + ? = 100
  16. 16.26 + ? = 100
  17. 17.5 + ? = 10
  18. 18.4 + ? = 10
  19. 19.89 + ? = 100
  20. 20.20 + ? = 100
  21. 21.85 + ? = 100
  22. 22.51 + ? = 100
  23. 23.11 + ? = 100
  24. 24.61 + ? = 100
  25. 25.1 + ? = 10
  26. 26.53 + ? = 100
  27. 27.48 + ? = 100
  28. 28.77 + ? = 100
  29. 29.66 + ? = 100
  30. 30.54 + ? = 100
  31. 31.82 + ? = 100
  32. 32.27 + ? = 100
  33. 33.70 + ? = 100
  34. 34.78 + ? = 100
  35. 35.55 + ? = 100
  36. 36.76 + ? = 100
  37. 37.7 + ? = 10
  38. 38.79 + ? = 100
  39. 39.81 + ? = 100
  40. 40.39 + ? = 100

Answer key

  1. 16
  2. 4
  3. 37
  4. 51
  5. 14
  6. 60
  7. 27
  8. 38
  9. 26
  10. 7
  11. 1
  12. 72
  13. 29
  14. 8
  15. 77
  16. 74
  17. 5
  18. 6
  19. 11
  20. 80
  21. 15
  22. 49
  23. 89
  24. 39
  25. 9
  26. 47
  27. 52
  28. 23
  29. 34
  30. 46
  31. 18
  32. 73
  33. 30
  34. 22
  35. 45
  36. 24
  37. 3
  38. 21
  39. 19
  40. 61

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