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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 908 · 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. 1.36 + ? = 100
  2. 2.6 + ? = 10
  3. 3.1 + ? = 10
  4. 4.87 + ? = 100
  5. 5.2 + ? = 10
  6. 6.53 + ? = 100
  7. 7.9 + ? = 10
  8. 8.59 + ? = 100
  9. 9.65 + ? = 100
  10. 10.8 + ? = 10
  11. 11.16 + ? = 100
  12. 12.4 + ? = 10
  13. 13.17 + ? = 100
  14. 14.72 + ? = 100
  15. 15.82 + ? = 100
  16. 16.84 + ? = 100
  17. 17.80 + ? = 100
  18. 18.3 + ? = 10
  19. 19.13 + ? = 100
  20. 20.63 + ? = 100
  21. 21.66 + ? = 100
  22. 22.58 + ? = 100
  23. 23.5 + ? = 10
  24. 24.7 + ? = 10
  25. 25.27 + ? = 100
  26. 26.43 + ? = 100
  27. 27.20 + ? = 100
  28. 28.69 + ? = 100
  29. 29.74 + ? = 100
  30. 30.30 + ? = 100
  31. 31.47 + ? = 100
  32. 32.52 + ? = 100
  33. 33.57 + ? = 100
  34. 34.83 + ? = 100
  35. 35.32 + ? = 100
  36. 36.70 + ? = 100
  37. 37.25 + ? = 100
  38. 38.45 + ? = 100
  39. 39.42 + ? = 100
  40. 40.51 + ? = 100

Answer key

  1. 64
  2. 4
  3. 9
  4. 13
  5. 8
  6. 47
  7. 1
  8. 41
  9. 35
  10. 2
  11. 84
  12. 6
  13. 83
  14. 28
  15. 18
  16. 16
  17. 20
  18. 7
  19. 87
  20. 37
  21. 34
  22. 42
  23. 5
  24. 3
  25. 73
  26. 57
  27. 80
  28. 31
  29. 26
  30. 70
  31. 53
  32. 48
  33. 43
  34. 17
  35. 68
  36. 30
  37. 75
  38. 55
  39. 58
  40. 49

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