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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 379 · 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 66 =
  2. 2.Half of 84 =
  3. 3.Half of 92 =
  4. 4.Half of 54 =
  5. 5.Double 36 =
  6. 6.Double 51 =
  7. 7.Double 73 =
  8. 8.Half of 76 =
  9. 9.Half of 182 =
  10. 10.Double 79 =
  11. 11.Half of 44 =
  12. 12.Half of 156 =
  13. 13.Double 57 =
  14. 14.Half of 138 =
  15. 15.Double 93 =
  16. 16.Half of 194 =
  17. 17.Half of 88 =
  18. 18.Half of 134 =
  19. 19.Double 11 =
  20. 20.Double 16 =
  21. 21.Double 78 =
  22. 22.Double 96 =
  23. 23.Double 41 =
  24. 24.Double 31 =
  25. 25.Half of 28 =
  26. 26.Double 37 =
  27. 27.Double 63 =
  28. 28.Double 52 =
  29. 29.Double 62 =
  30. 30.Half of 124 =
  31. 31.Half of 136 =
  32. 32.Double 29 =
  33. 33.Half of 122 =
  34. 34.Half of 34 =
  35. 35.Double 92 =
  36. 36.Half of 114 =
  37. 37.Half of 112 =
  38. 38.Double 76 =
  39. 39.Double 84 =
  40. 40.Double 12 =

Answer key

  1. 132
  2. 42
  3. 46
  4. 27
  5. 72
  6. 102
  7. 146
  8. 38
  9. 91
  10. 158
  11. 22
  12. 78
  13. 114
  14. 69
  15. 186
  16. 97
  17. 44
  18. 67
  19. 22
  20. 32
  21. 156
  22. 192
  23. 82
  24. 62
  25. 14
  26. 74
  27. 126
  28. 104
  29. 124
  30. 62
  31. 68
  32. 58
  33. 61
  34. 17
  35. 184
  36. 57
  37. 56
  38. 152
  39. 168
  40. 24

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