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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 966 · 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. 1.24 + ? = 100
  2. 2.23 + ? = 100
  3. 3.5 + ? = 10
  4. 4.6 + ? = 10
  5. 5.7 + ? = 10
  6. 6.22 + ? = 100
  7. 7.9 + ? = 10
  8. 8.8 + ? = 10
  9. 9.20 + ? = 100
  10. 10.4 + ? = 10
  11. 11.61 + ? = 100
  12. 12.60 + ? = 100
  13. 13.32 + ? = 100
  14. 14.54 + ? = 100
  15. 15.69 + ? = 100
  16. 16.78 + ? = 100
  17. 17.88 + ? = 100
  18. 18.3 + ? = 10
  19. 19.42 + ? = 100
  20. 20.33 + ? = 100
  21. 21.1 + ? = 10
  22. 22.58 + ? = 100
  23. 23.49 + ? = 100
  24. 24.25 + ? = 100
  25. 25.59 + ? = 100
  26. 26.66 + ? = 100
  27. 27.11 + ? = 100
  28. 28.83 + ? = 100
  29. 29.51 + ? = 100
  30. 30.15 + ? = 100
  31. 31.73 + ? = 100
  32. 32.16 + ? = 100
  33. 33.19 + ? = 100
  34. 34.68 + ? = 100
  35. 35.87 + ? = 100
  36. 36.47 + ? = 100
  37. 37.44 + ? = 100
  38. 38.35 + ? = 100
  39. 39.43 + ? = 100
  40. 40.30 + ? = 100

Answer key

  1. 76
  2. 77
  3. 5
  4. 4
  5. 3
  6. 78
  7. 1
  8. 2
  9. 80
  10. 6
  11. 39
  12. 40
  13. 68
  14. 46
  15. 31
  16. 22
  17. 12
  18. 7
  19. 58
  20. 67
  21. 9
  22. 42
  23. 51
  24. 75
  25. 41
  26. 34
  27. 89
  28. 17
  29. 49
  30. 85
  31. 27
  32. 84
  33. 81
  34. 32
  35. 13
  36. 53
  37. 56
  38. 65
  39. 57
  40. 70

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