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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 779 · 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. 1.13 + ? = 100
  2. 2.49 + ? = 100
  3. 3.2 + ? = 10
  4. 4.4 + ? = 10
  5. 5.3 + ? = 10
  6. 6.80 + ? = 100
  7. 7.9 + ? = 10
  8. 8.20 + ? = 100
  9. 9.42 + ? = 100
  10. 10.31 + ? = 100
  11. 11.77 + ? = 100
  12. 12.26 + ? = 100
  13. 13.23 + ? = 100
  14. 14.53 + ? = 100
  15. 15.5 + ? = 10
  16. 16.34 + ? = 100
  17. 17.6 + ? = 10
  18. 18.39 + ? = 100
  19. 19.1 + ? = 10
  20. 20.8 + ? = 10
  21. 21.60 + ? = 100
  22. 22.12 + ? = 100
  23. 23.71 + ? = 100
  24. 24.73 + ? = 100
  25. 25.44 + ? = 100
  26. 26.7 + ? = 10
  27. 27.63 + ? = 100
  28. 28.62 + ? = 100
  29. 29.21 + ? = 100
  30. 30.32 + ? = 100
  31. 31.18 + ? = 100
  32. 32.52 + ? = 100
  33. 33.86 + ? = 100
  34. 34.43 + ? = 100
  35. 35.15 + ? = 100
  36. 36.87 + ? = 100
  37. 37.38 + ? = 100
  38. 38.22 + ? = 100
  39. 39.85 + ? = 100
  40. 40.25 + ? = 100

Answer key

  1. 87
  2. 51
  3. 8
  4. 6
  5. 7
  6. 20
  7. 1
  8. 80
  9. 58
  10. 69
  11. 23
  12. 74
  13. 77
  14. 47
  15. 5
  16. 66
  17. 4
  18. 61
  19. 9
  20. 2
  21. 40
  22. 88
  23. 29
  24. 27
  25. 56
  26. 3
  27. 37
  28. 38
  29. 79
  30. 68
  31. 82
  32. 48
  33. 14
  34. 57
  35. 85
  36. 13
  37. 62
  38. 78
  39. 15
  40. 75

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