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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 933 · 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. 2.77 + ? = 100
  3. 3.59 + ? = 100
  4. 4.3 + ? = 10
  5. 5.8 + ? = 10
  6. 6.6 + ? = 10
  7. 7.12 + ? = 100
  8. 8.5 + ? = 10
  9. 9.68 + ? = 100
  10. 10.88 + ? = 100
  11. 11.38 + ? = 100
  12. 12.65 + ? = 100
  13. 13.80 + ? = 100
  14. 14.2 + ? = 10
  15. 15.75 + ? = 100
  16. 16.32 + ? = 100
  17. 17.47 + ? = 100
  18. 18.27 + ? = 100
  19. 19.71 + ? = 100
  20. 20.54 + ? = 100
  21. 21.84 + ? = 100
  22. 22.51 + ? = 100
  23. 23.4 + ? = 10
  24. 24.83 + ? = 100
  25. 25.40 + ? = 100
  26. 26.30 + ? = 100
  27. 27.9 + ? = 10
  28. 28.39 + ? = 100
  29. 29.34 + ? = 100
  30. 30.62 + ? = 100
  31. 31.7 + ? = 10
  32. 32.53 + ? = 100
  33. 33.79 + ? = 100
  34. 34.19 + ? = 100
  35. 35.89 + ? = 100
  36. 36.14 + ? = 100
  37. 37.69 + ? = 100
  38. 38.76 + ? = 100
  39. 39.36 + ? = 100
  40. 40.70 + ? = 100

Answer key

  1. 9
  2. 23
  3. 41
  4. 7
  5. 2
  6. 4
  7. 88
  8. 5
  9. 32
  10. 12
  11. 62
  12. 35
  13. 20
  14. 8
  15. 25
  16. 68
  17. 53
  18. 73
  19. 29
  20. 46
  21. 16
  22. 49
  23. 6
  24. 17
  25. 60
  26. 70
  27. 1
  28. 61
  29. 66
  30. 38
  31. 3
  32. 47
  33. 21
  34. 81
  35. 11
  36. 86
  37. 31
  38. 24
  39. 64
  40. 30

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