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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 163 · 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 51 =
  2. 2.Double 12 =
  3. 3.Double 78 =
  4. 4.Double 98 =
  5. 5.Double 45 =
  6. 6.Double 79 =
  7. 7.Half of 166 =
  8. 8.Half of 82 =
  9. 9.Half of 158 =
  10. 10.Double 23 =
  11. 11.Half of 196 =
  12. 12.Half of 54 =
  13. 13.Double 61 =
  14. 14.Double 64 =
  15. 15.Half of 132 =
  16. 16.Half of 92 =
  17. 17.Double 39 =
  18. 18.Double 91 =
  19. 19.Half of 174 =
  20. 20.Double 18 =
  21. 21.Double 26 =
  22. 22.Double 21 =
  23. 23.Half of 72 =
  24. 24.Half of 192 =
  25. 25.Double 74 =
  26. 26.Half of 86 =
  27. 27.Half of 186 =
  28. 28.Half of 16 =
  29. 29.Half of 176 =
  30. 30.Double 44 =
  31. 31.Half of 68 =
  32. 32.Half of 112 =
  33. 33.Double 47 =
  34. 34.Double 57 =
  35. 35.Double 46 =
  36. 36.Half of 152 =
  37. 37.Double 75 =
  38. 38.Double 92 =
  39. 39.Half of 76 =
  40. 40.Half of 62 =

Answer key

  1. 102
  2. 24
  3. 156
  4. 196
  5. 90
  6. 158
  7. 83
  8. 41
  9. 79
  10. 46
  11. 98
  12. 27
  13. 122
  14. 128
  15. 66
  16. 46
  17. 78
  18. 182
  19. 87
  20. 36
  21. 52
  22. 42
  23. 36
  24. 96
  25. 148
  26. 43
  27. 93
  28. 8
  29. 88
  30. 88
  31. 34
  32. 56
  33. 94
  34. 114
  35. 92
  36. 76
  37. 150
  38. 184
  39. 38
  40. 31

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