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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 848 · 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. 1.67 + ? = 100
  2. 2.12 + ? = 100
  3. 3.6 + ? = 10
  4. 4.8 + ? = 10
  5. 5.79 + ? = 100
  6. 6.88 + ? = 100
  7. 7.1 + ? = 10
  8. 8.64 + ? = 100
  9. 9.24 + ? = 100
  10. 10.5 + ? = 10
  11. 11.89 + ? = 100
  12. 12.86 + ? = 100
  13. 13.18 + ? = 100
  14. 14.45 + ? = 100
  15. 15.9 + ? = 10
  16. 16.2 + ? = 10
  17. 17.61 + ? = 100
  18. 18.49 + ? = 100
  19. 19.71 + ? = 100
  20. 20.83 + ? = 100
  21. 21.66 + ? = 100
  22. 22.55 + ? = 100
  23. 23.50 + ? = 100
  24. 24.33 + ? = 100
  25. 25.34 + ? = 100
  26. 26.17 + ? = 100
  27. 27.51 + ? = 100
  28. 28.32 + ? = 100
  29. 29.48 + ? = 100
  30. 30.19 + ? = 100
  31. 31.85 + ? = 100
  32. 32.52 + ? = 100
  33. 33.15 + ? = 100
  34. 34.7 + ? = 10
  35. 35.14 + ? = 100
  36. 36.20 + ? = 100
  37. 37.69 + ? = 100
  38. 38.4 + ? = 10
  39. 39.46 + ? = 100
  40. 40.38 + ? = 100

Answer key

  1. 33
  2. 88
  3. 4
  4. 2
  5. 21
  6. 12
  7. 9
  8. 36
  9. 76
  10. 5
  11. 11
  12. 14
  13. 82
  14. 55
  15. 1
  16. 8
  17. 39
  18. 51
  19. 29
  20. 17
  21. 34
  22. 45
  23. 50
  24. 67
  25. 66
  26. 83
  27. 49
  28. 68
  29. 52
  30. 81
  31. 15
  32. 48
  33. 85
  34. 3
  35. 86
  36. 80
  37. 31
  38. 6
  39. 54
  40. 62

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