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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 836 · 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 11 =
  2. 2.Half of 46 =
  3. 3.Half of 146 =
  4. 4.Double 18 =
  5. 5.Half of 164 =
  6. 6.Double 39 =
  7. 7.Half of 24 =
  8. 8.Double 47 =
  9. 9.Half of 176 =
  10. 10.Half of 68 =
  11. 11.Double 57 =
  12. 12.Half of 92 =
  13. 13.Double 75 =
  14. 14.Double 83 =
  15. 15.Double 99 =
  16. 16.Half of 86 =
  17. 17.Double 71 =
  18. 18.Double 51 =
  19. 19.Double 62 =
  20. 20.Double 32 =
  21. 21.Double 92 =
  22. 22.Half of 196 =
  23. 23.Double 97 =
  24. 24.Double 31 =
  25. 25.Half of 186 =
  26. 26.Half of 172 =
  27. 27.Double 72 =
  28. 28.Half of 102 =
  29. 29.Half of 36 =
  30. 30.Double 52 =
  31. 31.Half of 122 =
  32. 32.Half of 124 =
  33. 33.Double 88 =
  34. 34.Double 56 =
  35. 35.Half of 188 =
  36. 36.Half of 54 =
  37. 37.Double 35 =
  38. 38.Half of 72 =
  39. 39.Double 74 =
  40. 40.Half of 14 =

Answer key

  1. 22
  2. 23
  3. 73
  4. 36
  5. 82
  6. 78
  7. 12
  8. 94
  9. 88
  10. 34
  11. 114
  12. 46
  13. 150
  14. 166
  15. 198
  16. 43
  17. 142
  18. 102
  19. 124
  20. 64
  21. 184
  22. 98
  23. 194
  24. 62
  25. 93
  26. 86
  27. 144
  28. 51
  29. 18
  30. 104
  31. 61
  32. 62
  33. 176
  34. 112
  35. 94
  36. 27
  37. 70
  38. 36
  39. 148
  40. 7

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