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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 824 · 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. 1.43 + ? = 100
  2. 2.7 + ? = 10
  3. 3.71 + ? = 100
  4. 4.13 + ? = 100
  5. 5.2 + ? = 10
  6. 6.42 + ? = 100
  7. 7.9 + ? = 10
  8. 8.5 + ? = 10
  9. 9.1 + ? = 10
  10. 10.6 + ? = 10
  11. 11.3 + ? = 10
  12. 12.4 + ? = 10
  13. 13.56 + ? = 100
  14. 14.70 + ? = 100
  15. 15.50 + ? = 100
  16. 16.81 + ? = 100
  17. 17.26 + ? = 100
  18. 18.63 + ? = 100
  19. 19.69 + ? = 100
  20. 20.8 + ? = 10
  21. 21.66 + ? = 100
  22. 22.28 + ? = 100
  23. 23.14 + ? = 100
  24. 24.25 + ? = 100
  25. 25.60 + ? = 100
  26. 26.79 + ? = 100
  27. 27.12 + ? = 100
  28. 28.65 + ? = 100
  29. 29.75 + ? = 100
  30. 30.57 + ? = 100
  31. 31.76 + ? = 100
  32. 32.33 + ? = 100
  33. 33.40 + ? = 100
  34. 34.78 + ? = 100
  35. 35.29 + ? = 100
  36. 36.24 + ? = 100
  37. 37.53 + ? = 100
  38. 38.86 + ? = 100
  39. 39.44 + ? = 100
  40. 40.31 + ? = 100

Answer key

  1. 57
  2. 3
  3. 29
  4. 87
  5. 8
  6. 58
  7. 1
  8. 5
  9. 9
  10. 4
  11. 7
  12. 6
  13. 44
  14. 30
  15. 50
  16. 19
  17. 74
  18. 37
  19. 31
  20. 2
  21. 34
  22. 72
  23. 86
  24. 75
  25. 40
  26. 21
  27. 88
  28. 35
  29. 25
  30. 43
  31. 24
  32. 67
  33. 60
  34. 22
  35. 71
  36. 76
  37. 47
  38. 14
  39. 56
  40. 69

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