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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 69 · 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 41 =
  2. 2.Double 91 =
  3. 3.Double 98 =
  4. 4.Half of 182 =
  5. 5.Double 18 =
  6. 6.Double 45 =
  7. 7.Double 61 =
  8. 8.Half of 192 =
  9. 9.Half of 116 =
  10. 10.Half of 176 =
  11. 11.Half of 188 =
  12. 12.Double 79 =
  13. 13.Double 89 =
  14. 14.Half of 94 =
  15. 15.Double 29 =
  16. 16.Half of 42 =
  17. 17.Half of 62 =
  18. 18.Double 92 =
  19. 19.Double 33 =
  20. 20.Half of 148 =
  21. 21.Double 56 =
  22. 22.Double 78 =
  23. 23.Half of 152 =
  24. 24.Double 81 =
  25. 25.Half of 166 =
  26. 26.Double 68 =
  27. 27.Double 83 =
  28. 28.Double 58 =
  29. 29.Double 43 =
  30. 30.Half of 76 =
  31. 31.Double 51 =
  32. 32.Half of 162 =
  33. 33.Half of 36 =
  34. 34.Double 39 =
  35. 35.Half of 194 =
  36. 36.Double 59 =
  37. 37.Double 31 =
  38. 38.Half of 82 =
  39. 39.Double 94 =
  40. 40.Half of 156 =

Answer key

  1. 82
  2. 182
  3. 196
  4. 91
  5. 36
  6. 90
  7. 122
  8. 96
  9. 58
  10. 88
  11. 94
  12. 158
  13. 178
  14. 47
  15. 58
  16. 21
  17. 31
  18. 184
  19. 66
  20. 74
  21. 112
  22. 156
  23. 76
  24. 162
  25. 83
  26. 136
  27. 166
  28. 116
  29. 86
  30. 38
  31. 102
  32. 81
  33. 18
  34. 78
  35. 97
  36. 118
  37. 62
  38. 41
  39. 188
  40. 78

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