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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 767 · 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. 1.8 + ? = 10
  2. 2.70 + ? = 100
  3. 3.9 + ? = 10
  4. 4.86 + ? = 100
  5. 5.39 + ? = 100
  6. 6.30 + ? = 100
  7. 7.1 + ? = 10
  8. 8.3 + ? = 10
  9. 9.49 + ? = 100
  10. 10.75 + ? = 100
  11. 11.7 + ? = 10
  12. 12.16 + ? = 100
  13. 13.44 + ? = 100
  14. 14.57 + ? = 100
  15. 15.5 + ? = 10
  16. 16.33 + ? = 100
  17. 17.61 + ? = 100
  18. 18.77 + ? = 100
  19. 19.28 + ? = 100
  20. 20.37 + ? = 100
  21. 21.11 + ? = 100
  22. 22.4 + ? = 10
  23. 23.31 + ? = 100
  24. 24.19 + ? = 100
  25. 25.2 + ? = 10
  26. 26.27 + ? = 100
  27. 27.63 + ? = 100
  28. 28.78 + ? = 100
  29. 29.25 + ? = 100
  30. 30.6 + ? = 10
  31. 31.71 + ? = 100
  32. 32.13 + ? = 100
  33. 33.54 + ? = 100
  34. 34.62 + ? = 100
  35. 35.52 + ? = 100
  36. 36.89 + ? = 100
  37. 37.72 + ? = 100
  38. 38.41 + ? = 100
  39. 39.59 + ? = 100
  40. 40.38 + ? = 100

Answer key

  1. 2
  2. 30
  3. 1
  4. 14
  5. 61
  6. 70
  7. 9
  8. 7
  9. 51
  10. 25
  11. 3
  12. 84
  13. 56
  14. 43
  15. 5
  16. 67
  17. 39
  18. 23
  19. 72
  20. 63
  21. 89
  22. 6
  23. 69
  24. 81
  25. 8
  26. 73
  27. 37
  28. 22
  29. 75
  30. 4
  31. 29
  32. 87
  33. 46
  34. 38
  35. 48
  36. 11
  37. 28
  38. 59
  39. 41
  40. 62

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