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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 282 · 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 83 =
  2. 2.Double 93 =
  3. 3.Double 17 =
  4. 4.Double 67 =
  5. 5.Half of 182 =
  6. 6.Double 29 =
  7. 7.Double 42 =
  8. 8.Half of 112 =
  9. 9.Double 12 =
  10. 10.Double 15 =
  11. 11.Half of 22 =
  12. 12.Double 99 =
  13. 13.Double 92 =
  14. 14.Half of 42 =
  15. 15.Double 71 =
  16. 16.Half of 36 =
  17. 17.Double 23 =
  18. 18.Half of 32 =
  19. 19.Half of 18 =
  20. 20.Double 64 =
  21. 21.Double 26 =
  22. 22.Double 81 =
  23. 23.Half of 24 =
  24. 24.Double 34 =
  25. 25.Double 46 =
  26. 26.Double 45 =
  27. 27.Double 31 =
  28. 28.Half of 72 =
  29. 29.Half of 52 =
  30. 30.Half of 196 =
  31. 31.Half of 94 =
  32. 32.Double 49 =
  33. 33.Half of 58 =
  34. 34.Half of 86 =
  35. 35.Half of 28 =
  36. 36.Double 75 =
  37. 37.Half of 38 =
  38. 38.Double 61 =
  39. 39.Double 91 =
  40. 40.Half of 186 =

Answer key

  1. 166
  2. 186
  3. 34
  4. 134
  5. 91
  6. 58
  7. 84
  8. 56
  9. 24
  10. 30
  11. 11
  12. 198
  13. 184
  14. 21
  15. 142
  16. 18
  17. 46
  18. 16
  19. 9
  20. 128
  21. 52
  22. 162
  23. 12
  24. 68
  25. 92
  26. 90
  27. 62
  28. 36
  29. 26
  30. 98
  31. 47
  32. 98
  33. 29
  34. 43
  35. 14
  36. 150
  37. 19
  38. 122
  39. 182
  40. 93

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