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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 218 · 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 43 =
  2. 2.Half of 14 =
  3. 3.Double 32 =
  4. 4.Half of 132 =
  5. 5.Double 83 =
  6. 6.Half of 104 =
  7. 7.Double 59 =
  8. 8.Half of 44 =
  9. 9.Double 39 =
  10. 10.Half of 144 =
  11. 11.Double 87 =
  12. 12.Half of 186 =
  13. 13.Half of 88 =
  14. 14.Double 63 =
  15. 15.Double 35 =
  16. 16.Half of 194 =
  17. 17.Double 66 =
  18. 18.Double 14 =
  19. 19.Half of 162 =
  20. 20.Half of 16 =
  21. 21.Double 12 =
  22. 22.Double 36 =
  23. 23.Double 88 =
  24. 24.Half of 114 =
  25. 25.Double 91 =
  26. 26.Half of 46 =
  27. 27.Double 93 =
  28. 28.Half of 146 =
  29. 29.Half of 12 =
  30. 30.Half of 122 =
  31. 31.Double 53 =
  32. 32.Double 99 =
  33. 33.Double 51 =
  34. 34.Double 48 =
  35. 35.Half of 136 =
  36. 36.Double 62 =
  37. 37.Half of 106 =
  38. 38.Half of 198 =
  39. 39.Half of 154 =
  40. 40.Double 69 =

Answer key

  1. 86
  2. 7
  3. 64
  4. 66
  5. 166
  6. 52
  7. 118
  8. 22
  9. 78
  10. 72
  11. 174
  12. 93
  13. 44
  14. 126
  15. 70
  16. 97
  17. 132
  18. 28
  19. 81
  20. 8
  21. 24
  22. 72
  23. 176
  24. 57
  25. 182
  26. 23
  27. 186
  28. 73
  29. 6
  30. 61
  31. 106
  32. 198
  33. 102
  34. 96
  35. 68
  36. 124
  37. 53
  38. 99
  39. 77
  40. 138

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