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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 742 · 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. 2.6 + ? = 10
  3. 3.2 + ? = 10
  4. 4.62 + ? = 100
  5. 5.59 + ? = 100
  6. 6.7 + ? = 10
  7. 7.47 + ? = 100
  8. 8.8 + ? = 10
  9. 9.61 + ? = 100
  10. 10.55 + ? = 100
  11. 11.9 + ? = 10
  12. 12.11 + ? = 100
  13. 13.32 + ? = 100
  14. 14.28 + ? = 100
  15. 15.16 + ? = 100
  16. 16.4 + ? = 10
  17. 17.25 + ? = 100
  18. 18.37 + ? = 100
  19. 19.89 + ? = 100
  20. 20.58 + ? = 100
  21. 21.18 + ? = 100
  22. 22.3 + ? = 10
  23. 23.70 + ? = 100
  24. 24.17 + ? = 100
  25. 25.23 + ? = 100
  26. 26.5 + ? = 10
  27. 27.26 + ? = 100
  28. 28.21 + ? = 100
  29. 29.65 + ? = 100
  30. 30.45 + ? = 100
  31. 31.39 + ? = 100
  32. 32.75 + ? = 100
  33. 33.84 + ? = 100
  34. 34.68 + ? = 100
  35. 35.71 + ? = 100
  36. 36.27 + ? = 100
  37. 37.36 + ? = 100
  38. 38.88 + ? = 100
  39. 39.57 + ? = 100
  40. 40.51 + ? = 100

Answer key

  1. 9
  2. 4
  3. 8
  4. 38
  5. 41
  6. 3
  7. 53
  8. 2
  9. 39
  10. 45
  11. 1
  12. 89
  13. 68
  14. 72
  15. 84
  16. 6
  17. 75
  18. 63
  19. 11
  20. 42
  21. 82
  22. 7
  23. 30
  24. 83
  25. 77
  26. 5
  27. 74
  28. 79
  29. 35
  30. 55
  31. 61
  32. 25
  33. 16
  34. 32
  35. 29
  36. 73
  37. 64
  38. 12
  39. 43
  40. 49

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