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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 252 · 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. 1.74 + ? = 100
  2. 2.3 + ? = 10
  3. 3.2 + ? = 10
  4. 4.32 + ? = 100
  5. 5.58 + ? = 100
  6. 6.9 + ? = 10
  7. 7.81 + ? = 100
  8. 8.6 + ? = 10
  9. 9.7 + ? = 10
  10. 10.1 + ? = 10
  11. 11.8 + ? = 10
  12. 12.41 + ? = 100
  13. 13.19 + ? = 100
  14. 14.4 + ? = 10
  15. 15.47 + ? = 100
  16. 16.71 + ? = 100
  17. 17.64 + ? = 100
  18. 18.75 + ? = 100
  19. 19.57 + ? = 100
  20. 20.26 + ? = 100
  21. 21.42 + ? = 100
  22. 22.15 + ? = 100
  23. 23.5 + ? = 10
  24. 24.12 + ? = 100
  25. 25.33 + ? = 100
  26. 26.31 + ? = 100
  27. 27.51 + ? = 100
  28. 28.16 + ? = 100
  29. 29.36 + ? = 100
  30. 30.62 + ? = 100
  31. 31.14 + ? = 100
  32. 32.69 + ? = 100
  33. 33.66 + ? = 100
  34. 34.29 + ? = 100
  35. 35.48 + ? = 100
  36. 36.23 + ? = 100
  37. 37.25 + ? = 100
  38. 38.77 + ? = 100
  39. 39.88 + ? = 100
  40. 40.67 + ? = 100

Answer key

  1. 26
  2. 7
  3. 8
  4. 68
  5. 42
  6. 1
  7. 19
  8. 4
  9. 3
  10. 9
  11. 2
  12. 59
  13. 81
  14. 6
  15. 53
  16. 29
  17. 36
  18. 25
  19. 43
  20. 74
  21. 58
  22. 85
  23. 5
  24. 88
  25. 67
  26. 69
  27. 49
  28. 84
  29. 64
  30. 38
  31. 86
  32. 31
  33. 34
  34. 71
  35. 52
  36. 77
  37. 75
  38. 23
  39. 12
  40. 33

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