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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 436 · 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 34 =
  2. 2.Double 46 =
  3. 3.Half of 94 =
  4. 4.Double 91 =
  5. 5.Double 16 =
  6. 6.Half of 166 =
  7. 7.Half of 152 =
  8. 8.Double 11 =
  9. 9.Double 93 =
  10. 10.Double 55 =
  11. 11.Half of 26 =
  12. 12.Double 75 =
  13. 13.Double 88 =
  14. 14.Double 67 =
  15. 15.Double 29 =
  16. 16.Half of 64 =
  17. 17.Double 48 =
  18. 18.Double 66 =
  19. 19.Half of 54 =
  20. 20.Half of 18 =
  21. 21.Double 94 =
  22. 22.Half of 116 =
  23. 23.Half of 176 =
  24. 24.Half of 136 =
  25. 25.Double 41 =
  26. 26.Double 56 =
  27. 27.Double 51 =
  28. 28.Double 17 =
  29. 29.Double 44 =
  30. 30.Half of 66 =
  31. 31.Double 21 =
  32. 32.Double 74 =
  33. 33.Double 81 =
  34. 34.Double 58 =
  35. 35.Half of 148 =
  36. 36.Half of 106 =
  37. 37.Double 52 =
  38. 38.Half of 38 =
  39. 39.Double 49 =
  40. 40.Double 71 =

Answer key

  1. 17
  2. 92
  3. 47
  4. 182
  5. 32
  6. 83
  7. 76
  8. 22
  9. 186
  10. 110
  11. 13
  12. 150
  13. 176
  14. 134
  15. 58
  16. 32
  17. 96
  18. 132
  19. 27
  20. 9
  21. 188
  22. 58
  23. 88
  24. 68
  25. 82
  26. 112
  27. 102
  28. 34
  29. 88
  30. 33
  31. 42
  32. 148
  33. 162
  34. 116
  35. 74
  36. 53
  37. 104
  38. 19
  39. 98
  40. 142

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