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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 833 · 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. 1.68 + ? = 100
  2. 2.11 + ? = 100
  3. 3.17 + ? = 100
  4. 4.64 + ? = 100
  5. 5.12 + ? = 100
  6. 6.7 + ? = 10
  7. 7.21 + ? = 100
  8. 8.8 + ? = 10
  9. 9.4 + ? = 10
  10. 10.1 + ? = 10
  11. 11.2 + ? = 10
  12. 12.86 + ? = 100
  13. 13.29 + ? = 100
  14. 14.3 + ? = 10
  15. 15.5 + ? = 10
  16. 16.9 + ? = 10
  17. 17.38 + ? = 100
  18. 18.75 + ? = 100
  19. 19.37 + ? = 100
  20. 20.26 + ? = 100
  21. 21.74 + ? = 100
  22. 22.84 + ? = 100
  23. 23.14 + ? = 100
  24. 24.51 + ? = 100
  25. 25.25 + ? = 100
  26. 26.32 + ? = 100
  27. 27.59 + ? = 100
  28. 28.53 + ? = 100
  29. 29.41 + ? = 100
  30. 30.73 + ? = 100
  31. 31.19 + ? = 100
  32. 32.6 + ? = 10
  33. 33.30 + ? = 100
  34. 34.13 + ? = 100
  35. 35.69 + ? = 100
  36. 36.66 + ? = 100
  37. 37.89 + ? = 100
  38. 38.36 + ? = 100
  39. 39.22 + ? = 100
  40. 40.67 + ? = 100

Answer key

  1. 32
  2. 89
  3. 83
  4. 36
  5. 88
  6. 3
  7. 79
  8. 2
  9. 6
  10. 9
  11. 8
  12. 14
  13. 71
  14. 7
  15. 5
  16. 1
  17. 62
  18. 25
  19. 63
  20. 74
  21. 26
  22. 16
  23. 86
  24. 49
  25. 75
  26. 68
  27. 41
  28. 47
  29. 59
  30. 27
  31. 81
  32. 4
  33. 70
  34. 87
  35. 31
  36. 34
  37. 11
  38. 64
  39. 78
  40. 33

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