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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 790 · 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. 1.2 + ? = 10
  2. 2.1 + ? = 10
  3. 3.7 + ? = 10
  4. 4.34 + ? = 100
  5. 5.9 + ? = 10
  6. 6.46 + ? = 100
  7. 7.17 + ? = 100
  8. 8.3 + ? = 10
  9. 9.8 + ? = 10
  10. 10.86 + ? = 100
  11. 11.54 + ? = 100
  12. 12.68 + ? = 100
  13. 13.4 + ? = 10
  14. 14.78 + ? = 100
  15. 15.31 + ? = 100
  16. 16.79 + ? = 100
  17. 17.61 + ? = 100
  18. 18.24 + ? = 100
  19. 19.14 + ? = 100
  20. 20.83 + ? = 100
  21. 21.21 + ? = 100
  22. 22.63 + ? = 100
  23. 23.44 + ? = 100
  24. 24.81 + ? = 100
  25. 25.55 + ? = 100
  26. 26.6 + ? = 10
  27. 27.40 + ? = 100
  28. 28.50 + ? = 100
  29. 29.5 + ? = 10
  30. 30.64 + ? = 100
  31. 31.69 + ? = 100
  32. 32.18 + ? = 100
  33. 33.20 + ? = 100
  34. 34.33 + ? = 100
  35. 35.23 + ? = 100
  36. 36.70 + ? = 100
  37. 37.72 + ? = 100
  38. 38.27 + ? = 100
  39. 39.15 + ? = 100
  40. 40.13 + ? = 100

Answer key

  1. 8
  2. 9
  3. 3
  4. 66
  5. 1
  6. 54
  7. 83
  8. 7
  9. 2
  10. 14
  11. 46
  12. 32
  13. 6
  14. 22
  15. 69
  16. 21
  17. 39
  18. 76
  19. 86
  20. 17
  21. 79
  22. 37
  23. 56
  24. 19
  25. 45
  26. 4
  27. 60
  28. 50
  29. 5
  30. 36
  31. 31
  32. 82
  33. 80
  34. 67
  35. 77
  36. 30
  37. 28
  38. 73
  39. 85
  40. 87

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