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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 939 · 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. 1.5 + ? = 10
  2. 2.42 + ? = 100
  3. 3.87 + ? = 100
  4. 4.1 + ? = 10
  5. 5.13 + ? = 100
  6. 6.44 + ? = 100
  7. 7.54 + ? = 100
  8. 8.46 + ? = 100
  9. 9.6 + ? = 10
  10. 10.4 + ? = 10
  11. 11.8 + ? = 10
  12. 12.3 + ? = 10
  13. 13.2 + ? = 10
  14. 14.45 + ? = 100
  15. 15.80 + ? = 100
  16. 16.47 + ? = 100
  17. 17.12 + ? = 100
  18. 18.83 + ? = 100
  19. 19.7 + ? = 10
  20. 20.86 + ? = 100
  21. 21.58 + ? = 100
  22. 22.61 + ? = 100
  23. 23.88 + ? = 100
  24. 24.15 + ? = 100
  25. 25.27 + ? = 100
  26. 26.89 + ? = 100
  27. 27.16 + ? = 100
  28. 28.57 + ? = 100
  29. 29.17 + ? = 100
  30. 30.14 + ? = 100
  31. 31.75 + ? = 100
  32. 32.82 + ? = 100
  33. 33.18 + ? = 100
  34. 34.50 + ? = 100
  35. 35.9 + ? = 10
  36. 36.43 + ? = 100
  37. 37.24 + ? = 100
  38. 38.84 + ? = 100
  39. 39.36 + ? = 100
  40. 40.71 + ? = 100

Answer key

  1. 5
  2. 58
  3. 13
  4. 9
  5. 87
  6. 56
  7. 46
  8. 54
  9. 4
  10. 6
  11. 2
  12. 7
  13. 8
  14. 55
  15. 20
  16. 53
  17. 88
  18. 17
  19. 3
  20. 14
  21. 42
  22. 39
  23. 12
  24. 85
  25. 73
  26. 11
  27. 84
  28. 43
  29. 83
  30. 86
  31. 25
  32. 18
  33. 82
  34. 50
  35. 1
  36. 57
  37. 76
  38. 16
  39. 64
  40. 29

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