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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 864 · 40 questions
TalentJR

The trick (Split and double): Split the number into tens and ones: 37 = 30 + 7. Double each part (30 → 60, 7 → 14) — or halve each part. Add the two answers: 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.Double 79 =
  2. 2.Double 88 =
  3. 3.Double 17 =
  4. 4.Double 55 =
  5. 5.Half of 42 =
  6. 6.Half of 16 =
  7. 7.Double 84 =
  8. 8.Double 75 =
  9. 9.Half of 92 =
  10. 10.Half of 198 =
  11. 11.Half of 108 =
  12. 12.Half of 12 =
  13. 13.Double 43 =
  14. 14.Half of 132 =
  15. 15.Double 82 =
  16. 16.Half of 32 =
  17. 17.Double 81 =
  18. 18.Half of 58 =
  19. 19.Double 29 =
  20. 20.Double 86 =
  21. 21.Double 99 =
  22. 22.Double 68 =
  23. 23.Half of 48 =
  24. 24.Half of 156 =
  25. 25.Double 16 =
  26. 26.Half of 168 =
  27. 27.Double 89 =
  28. 28.Double 47 =
  29. 29.Double 91 =
  30. 30.Double 64 =
  31. 31.Half of 104 =
  32. 32.Half of 62 =
  33. 33.Double 15 =
  34. 34.Double 93 =
  35. 35.Double 31 =
  36. 36.Half of 84 =
  37. 37.Double 59 =
  38. 38.Half of 96 =
  39. 39.Double 37 =
  40. 40.Half of 172 =

Answer key

  1. 158
  2. 176
  3. 34
  4. 110
  5. 21
  6. 8
  7. 168
  8. 150
  9. 46
  10. 99
  11. 54
  12. 6
  13. 86
  14. 66
  15. 164
  16. 16
  17. 162
  18. 29
  19. 58
  20. 172
  21. 198
  22. 136
  23. 24
  24. 78
  25. 32
  26. 84
  27. 178
  28. 94
  29. 182
  30. 128
  31. 52
  32. 31
  33. 30
  34. 186
  35. 62
  36. 42
  37. 118
  38. 48
  39. 74
  40. 86

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