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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 176 · 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. 1.56 + ? = 100
  2. 2.69 + ? = 100
  3. 3.3 + ? = 10
  4. 4.71 + ? = 100
  5. 5.2 + ? = 10
  6. 6.32 + ? = 100
  7. 7.1 + ? = 10
  8. 8.59 + ? = 100
  9. 9.73 + ? = 100
  10. 10.23 + ? = 100
  11. 11.57 + ? = 100
  12. 12.17 + ? = 100
  13. 13.51 + ? = 100
  14. 14.31 + ? = 100
  15. 15.4 + ? = 10
  16. 16.6 + ? = 10
  17. 17.24 + ? = 100
  18. 18.16 + ? = 100
  19. 19.27 + ? = 100
  20. 20.47 + ? = 100
  21. 21.85 + ? = 100
  22. 22.7 + ? = 10
  23. 23.46 + ? = 100
  24. 24.88 + ? = 100
  25. 25.82 + ? = 100
  26. 26.62 + ? = 100
  27. 27.33 + ? = 100
  28. 28.66 + ? = 100
  29. 29.8 + ? = 10
  30. 30.76 + ? = 100
  31. 31.35 + ? = 100
  32. 32.5 + ? = 10
  33. 33.77 + ? = 100
  34. 34.21 + ? = 100
  35. 35.65 + ? = 100
  36. 36.70 + ? = 100
  37. 37.9 + ? = 10
  38. 38.50 + ? = 100
  39. 39.75 + ? = 100
  40. 40.49 + ? = 100

Answer key

  1. 44
  2. 31
  3. 7
  4. 29
  5. 8
  6. 68
  7. 9
  8. 41
  9. 27
  10. 77
  11. 43
  12. 83
  13. 49
  14. 69
  15. 6
  16. 4
  17. 76
  18. 84
  19. 73
  20. 53
  21. 15
  22. 3
  23. 54
  24. 12
  25. 18
  26. 38
  27. 67
  28. 34
  29. 2
  30. 24
  31. 65
  32. 5
  33. 23
  34. 79
  35. 35
  36. 30
  37. 1
  38. 50
  39. 25
  40. 51

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