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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 706 · 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 71 =
  2. 2.Half of 22 =
  3. 3.Half of 98 =
  4. 4.Half of 102 =
  5. 5.Double 74 =
  6. 6.Half of 186 =
  7. 7.Double 64 =
  8. 8.Double 99 =
  9. 9.Double 45 =
  10. 10.Double 92 =
  11. 11.Double 68 =
  12. 12.Half of 88 =
  13. 13.Double 13 =
  14. 14.Double 69 =
  15. 15.Double 78 =
  16. 16.Half of 112 =
  17. 17.Double 91 =
  18. 18.Double 25 =
  19. 19.Double 96 =
  20. 20.Half of 124 =
  21. 21.Double 62 =
  22. 22.Double 51 =
  23. 23.Half of 62 =
  24. 24.Half of 162 =
  25. 25.Half of 72 =
  26. 26.Double 38 =
  27. 27.Double 27 =
  28. 28.Half of 84 =
  29. 29.Double 29 =
  30. 30.Double 49 =
  31. 31.Double 61 =
  32. 32.Double 28 =
  33. 33.Half of 42 =
  34. 34.Double 26 =
  35. 35.Half of 158 =
  36. 36.Double 94 =
  37. 37.Half of 26 =
  38. 38.Half of 86 =
  39. 39.Half of 66 =
  40. 40.Half of 172 =

Answer key

  1. 142
  2. 11
  3. 49
  4. 51
  5. 148
  6. 93
  7. 128
  8. 198
  9. 90
  10. 184
  11. 136
  12. 44
  13. 26
  14. 138
  15. 156
  16. 56
  17. 182
  18. 50
  19. 192
  20. 62
  21. 124
  22. 102
  23. 31
  24. 81
  25. 36
  26. 76
  27. 54
  28. 42
  29. 58
  30. 98
  31. 122
  32. 56
  33. 21
  34. 52
  35. 79
  36. 188
  37. 13
  38. 43
  39. 33
  40. 86

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