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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 744 · 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. 1.1 + ? = 10
  2. 2.65 + ? = 100
  3. 3.46 + ? = 100
  4. 4.83 + ? = 100
  5. 5.23 + ? = 100
  6. 6.17 + ? = 100
  7. 7.8 + ? = 10
  8. 8.2 + ? = 10
  9. 9.7 + ? = 10
  10. 10.56 + ? = 100
  11. 11.19 + ? = 100
  12. 12.52 + ? = 100
  13. 13.88 + ? = 100
  14. 14.31 + ? = 100
  15. 15.71 + ? = 100
  16. 16.9 + ? = 10
  17. 17.41 + ? = 100
  18. 18.4 + ? = 10
  19. 19.62 + ? = 100
  20. 20.36 + ? = 100
  21. 21.22 + ? = 100
  22. 22.76 + ? = 100
  23. 23.69 + ? = 100
  24. 24.5 + ? = 10
  25. 25.86 + ? = 100
  26. 26.42 + ? = 100
  27. 27.12 + ? = 100
  28. 28.38 + ? = 100
  29. 29.32 + ? = 100
  30. 30.34 + ? = 100
  31. 31.28 + ? = 100
  32. 32.6 + ? = 10
  33. 33.80 + ? = 100
  34. 34.59 + ? = 100
  35. 35.29 + ? = 100
  36. 36.39 + ? = 100
  37. 37.68 + ? = 100
  38. 38.77 + ? = 100
  39. 39.21 + ? = 100
  40. 40.45 + ? = 100

Answer key

  1. 9
  2. 35
  3. 54
  4. 17
  5. 77
  6. 83
  7. 2
  8. 8
  9. 3
  10. 44
  11. 81
  12. 48
  13. 12
  14. 69
  15. 29
  16. 1
  17. 59
  18. 6
  19. 38
  20. 64
  21. 78
  22. 24
  23. 31
  24. 5
  25. 14
  26. 58
  27. 88
  28. 62
  29. 68
  30. 66
  31. 72
  32. 4
  33. 20
  34. 41
  35. 71
  36. 61
  37. 32
  38. 23
  39. 79
  40. 55

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