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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 950 · 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. 2.15 + ? = 100
  3. 3.7 + ? = 10
  4. 4.46 + ? = 100
  5. 5.3 + ? = 10
  6. 6.17 + ? = 100
  7. 7.14 + ? = 100
  8. 8.27 + ? = 100
  9. 9.69 + ? = 100
  10. 10.12 + ? = 100
  11. 11.23 + ? = 100
  12. 12.1 + ? = 10
  13. 13.31 + ? = 100
  14. 14.2 + ? = 10
  15. 15.72 + ? = 100
  16. 16.42 + ? = 100
  17. 17.59 + ? = 100
  18. 18.9 + ? = 10
  19. 19.38 + ? = 100
  20. 20.6 + ? = 10
  21. 21.60 + ? = 100
  22. 22.16 + ? = 100
  23. 23.84 + ? = 100
  24. 24.55 + ? = 100
  25. 25.89 + ? = 100
  26. 26.4 + ? = 10
  27. 27.5 + ? = 10
  28. 28.66 + ? = 100
  29. 29.82 + ? = 100
  30. 30.20 + ? = 100
  31. 31.25 + ? = 100
  32. 32.58 + ? = 100
  33. 33.18 + ? = 100
  34. 34.41 + ? = 100
  35. 35.51 + ? = 100
  36. 36.47 + ? = 100
  37. 37.65 + ? = 100
  38. 38.87 + ? = 100
  39. 39.79 + ? = 100
  40. 40.53 + ? = 100

Answer key

  1. 2
  2. 85
  3. 3
  4. 54
  5. 7
  6. 83
  7. 86
  8. 73
  9. 31
  10. 88
  11. 77
  12. 9
  13. 69
  14. 8
  15. 28
  16. 58
  17. 41
  18. 1
  19. 62
  20. 4
  21. 40
  22. 84
  23. 16
  24. 45
  25. 11
  26. 6
  27. 5
  28. 34
  29. 18
  30. 80
  31. 75
  32. 42
  33. 82
  34. 59
  35. 49
  36. 53
  37. 35
  38. 13
  39. 21
  40. 47

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