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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 747 · 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. 1.48 + ? = 100
  2. 2.50 + ? = 100
  3. 3.22 + ? = 100
  4. 4.53 + ? = 100
  5. 5.11 + ? = 100
  6. 6.78 + ? = 100
  7. 7.8 + ? = 10
  8. 8.5 + ? = 10
  9. 9.58 + ? = 100
  10. 10.7 + ? = 10
  11. 11.1 + ? = 10
  12. 12.6 + ? = 10
  13. 13.81 + ? = 100
  14. 14.9 + ? = 10
  15. 15.39 + ? = 100
  16. 16.2 + ? = 10
  17. 17.38 + ? = 100
  18. 18.4 + ? = 10
  19. 19.13 + ? = 100
  20. 20.45 + ? = 100
  21. 21.28 + ? = 100
  22. 22.52 + ? = 100
  23. 23.25 + ? = 100
  24. 24.14 + ? = 100
  25. 25.55 + ? = 100
  26. 26.18 + ? = 100
  27. 27.64 + ? = 100
  28. 28.34 + ? = 100
  29. 29.72 + ? = 100
  30. 30.17 + ? = 100
  31. 31.88 + ? = 100
  32. 32.3 + ? = 10
  33. 33.75 + ? = 100
  34. 34.54 + ? = 100
  35. 35.84 + ? = 100
  36. 36.43 + ? = 100
  37. 37.67 + ? = 100
  38. 38.87 + ? = 100
  39. 39.40 + ? = 100
  40. 40.68 + ? = 100

Answer key

  1. 52
  2. 50
  3. 78
  4. 47
  5. 89
  6. 22
  7. 2
  8. 5
  9. 42
  10. 3
  11. 9
  12. 4
  13. 19
  14. 1
  15. 61
  16. 8
  17. 62
  18. 6
  19. 87
  20. 55
  21. 72
  22. 48
  23. 75
  24. 86
  25. 45
  26. 82
  27. 36
  28. 66
  29. 28
  30. 83
  31. 12
  32. 7
  33. 25
  34. 46
  35. 16
  36. 57
  37. 33
  38. 13
  39. 60
  40. 32

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