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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 818 · 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. 1.11 + ? = 100
  2. 2.7 + ? = 10
  3. 3.33 + ? = 100
  4. 4.8 + ? = 10
  5. 5.1 + ? = 10
  6. 6.86 + ? = 100
  7. 7.13 + ? = 100
  8. 8.5 + ? = 10
  9. 9.21 + ? = 100
  10. 10.46 + ? = 100
  11. 11.20 + ? = 100
  12. 12.41 + ? = 100
  13. 13.9 + ? = 10
  14. 14.53 + ? = 100
  15. 15.50 + ? = 100
  16. 16.57 + ? = 100
  17. 17.59 + ? = 100
  18. 18.85 + ? = 100
  19. 19.3 + ? = 10
  20. 20.29 + ? = 100
  21. 21.4 + ? = 10
  22. 22.19 + ? = 100
  23. 23.2 + ? = 10
  24. 24.83 + ? = 100
  25. 25.24 + ? = 100
  26. 26.6 + ? = 10
  27. 27.22 + ? = 100
  28. 28.44 + ? = 100
  29. 29.17 + ? = 100
  30. 30.71 + ? = 100
  31. 31.88 + ? = 100
  32. 32.36 + ? = 100
  33. 33.61 + ? = 100
  34. 34.42 + ? = 100
  35. 35.62 + ? = 100
  36. 36.52 + ? = 100
  37. 37.77 + ? = 100
  38. 38.26 + ? = 100
  39. 39.32 + ? = 100
  40. 40.38 + ? = 100

Answer key

  1. 89
  2. 3
  3. 67
  4. 2
  5. 9
  6. 14
  7. 87
  8. 5
  9. 79
  10. 54
  11. 80
  12. 59
  13. 1
  14. 47
  15. 50
  16. 43
  17. 41
  18. 15
  19. 7
  20. 71
  21. 6
  22. 81
  23. 8
  24. 17
  25. 76
  26. 4
  27. 78
  28. 56
  29. 83
  30. 29
  31. 12
  32. 64
  33. 39
  34. 58
  35. 38
  36. 48
  37. 23
  38. 74
  39. 68
  40. 62

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