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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 427 · 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.Half of 178 =
  2. 2.Half of 182 =
  3. 3.Half of 98 =
  4. 4.Double 56 =
  5. 5.Half of 72 =
  6. 6.Double 71 =
  7. 7.Half of 44 =
  8. 8.Half of 34 =
  9. 9.Double 43 =
  10. 10.Half of 88 =
  11. 11.Double 24 =
  12. 12.Double 76 =
  13. 13.Double 51 =
  14. 14.Double 86 =
  15. 15.Half of 32 =
  16. 16.Half of 22 =
  17. 17.Double 48 =
  18. 18.Half of 106 =
  19. 19.Half of 196 =
  20. 20.Half of 108 =
  21. 21.Half of 186 =
  22. 22.Half of 68 =
  23. 23.Double 36 =
  24. 24.Double 27 =
  25. 25.Double 13 =
  26. 26.Double 75 =
  27. 27.Half of 84 =
  28. 28.Double 14 =
  29. 29.Double 83 =
  30. 30.Double 68 =
  31. 31.Half of 112 =
  32. 32.Half of 126 =
  33. 33.Half of 124 =
  34. 34.Half of 154 =
  35. 35.Half of 166 =
  36. 36.Half of 24 =
  37. 37.Double 92 =
  38. 38.Half of 14 =
  39. 39.Double 99 =
  40. 40.Double 94 =

Answer key

  1. 89
  2. 91
  3. 49
  4. 112
  5. 36
  6. 142
  7. 22
  8. 17
  9. 86
  10. 44
  11. 48
  12. 152
  13. 102
  14. 172
  15. 16
  16. 11
  17. 96
  18. 53
  19. 98
  20. 54
  21. 93
  22. 34
  23. 72
  24. 54
  25. 26
  26. 150
  27. 42
  28. 28
  29. 166
  30. 136
  31. 56
  32. 63
  33. 62
  34. 77
  35. 83
  36. 12
  37. 184
  38. 7
  39. 198
  40. 188

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