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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 907 · 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. 1.14 + ? = 100
  2. 2.12 + ? = 100
  3. 3.42 + ? = 100
  4. 4.5 + ? = 10
  5. 5.76 + ? = 100
  6. 6.4 + ? = 10
  7. 7.44 + ? = 100
  8. 8.85 + ? = 100
  9. 9.6 + ? = 10
  10. 10.64 + ? = 100
  11. 11.1 + ? = 10
  12. 12.70 + ? = 100
  13. 13.7 + ? = 10
  14. 14.25 + ? = 100
  15. 15.54 + ? = 100
  16. 16.21 + ? = 100
  17. 17.17 + ? = 100
  18. 18.71 + ? = 100
  19. 19.86 + ? = 100
  20. 20.48 + ? = 100
  21. 21.2 + ? = 10
  22. 22.34 + ? = 100
  23. 23.77 + ? = 100
  24. 24.89 + ? = 100
  25. 25.32 + ? = 100
  26. 26.9 + ? = 10
  27. 27.49 + ? = 100
  28. 28.56 + ? = 100
  29. 29.18 + ? = 100
  30. 30.80 + ? = 100
  31. 31.39 + ? = 100
  32. 32.65 + ? = 100
  33. 33.67 + ? = 100
  34. 34.33 + ? = 100
  35. 35.8 + ? = 10
  36. 36.19 + ? = 100
  37. 37.62 + ? = 100
  38. 38.26 + ? = 100
  39. 39.3 + ? = 10
  40. 40.30 + ? = 100

Answer key

  1. 86
  2. 88
  3. 58
  4. 5
  5. 24
  6. 6
  7. 56
  8. 15
  9. 4
  10. 36
  11. 9
  12. 30
  13. 3
  14. 75
  15. 46
  16. 79
  17. 83
  18. 29
  19. 14
  20. 52
  21. 8
  22. 66
  23. 23
  24. 11
  25. 68
  26. 1
  27. 51
  28. 44
  29. 82
  30. 20
  31. 61
  32. 35
  33. 33
  34. 67
  35. 2
  36. 81
  37. 38
  38. 74
  39. 7
  40. 70

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