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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 987 · 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. 1.7 + ? = 10
  2. 2.9 + ? = 10
  3. 3.3 + ? = 10
  4. 4.56 + ? = 100
  5. 5.45 + ? = 100
  6. 6.4 + ? = 10
  7. 7.88 + ? = 100
  8. 8.5 + ? = 10
  9. 9.36 + ? = 100
  10. 10.2 + ? = 10
  11. 11.22 + ? = 100
  12. 12.6 + ? = 10
  13. 13.83 + ? = 100
  14. 14.74 + ? = 100
  15. 15.1 + ? = 10
  16. 16.43 + ? = 100
  17. 17.79 + ? = 100
  18. 18.8 + ? = 10
  19. 19.84 + ? = 100
  20. 20.39 + ? = 100
  21. 21.33 + ? = 100
  22. 22.29 + ? = 100
  23. 23.55 + ? = 100
  24. 24.76 + ? = 100
  25. 25.59 + ? = 100
  26. 26.14 + ? = 100
  27. 27.11 + ? = 100
  28. 28.42 + ? = 100
  29. 29.28 + ? = 100
  30. 30.64 + ? = 100
  31. 31.32 + ? = 100
  32. 32.40 + ? = 100
  33. 33.19 + ? = 100
  34. 34.37 + ? = 100
  35. 35.54 + ? = 100
  36. 36.16 + ? = 100
  37. 37.89 + ? = 100
  38. 38.66 + ? = 100
  39. 39.71 + ? = 100
  40. 40.68 + ? = 100

Answer key

  1. 3
  2. 1
  3. 7
  4. 44
  5. 55
  6. 6
  7. 12
  8. 5
  9. 64
  10. 8
  11. 78
  12. 4
  13. 17
  14. 26
  15. 9
  16. 57
  17. 21
  18. 2
  19. 16
  20. 61
  21. 67
  22. 71
  23. 45
  24. 24
  25. 41
  26. 86
  27. 89
  28. 58
  29. 72
  30. 36
  31. 68
  32. 60
  33. 81
  34. 63
  35. 46
  36. 84
  37. 11
  38. 34
  39. 29
  40. 32

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