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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 48 · 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 64 =
  2. 2.Double 33 =
  3. 3.Double 51 =
  4. 4.Double 38 =
  5. 5.Half of 134 =
  6. 6.Double 68 =
  7. 7.Half of 194 =
  8. 8.Half of 118 =
  9. 9.Double 74 =
  10. 10.Double 84 =
  11. 11.Half of 32 =
  12. 12.Half of 82 =
  13. 13.Half of 86 =
  14. 14.Double 93 =
  15. 15.Half of 146 =
  16. 16.Double 55 =
  17. 17.Half of 22 =
  18. 18.Double 22 =
  19. 19.Double 71 =
  20. 20.Double 59 =
  21. 21.Half of 98 =
  22. 22.Half of 186 =
  23. 23.Half of 142 =
  24. 24.Double 11 =
  25. 25.Half of 42 =
  26. 26.Double 37 =
  27. 27.Half of 176 =
  28. 28.Half of 156 =
  29. 29.Double 86 =
  30. 30.Half of 102 =
  31. 31.Double 81 =
  32. 32.Half of 192 =
  33. 33.Half of 72 =
  34. 34.Double 78 =
  35. 35.Half of 196 =
  36. 36.Double 24 =
  37. 37.Double 43 =
  38. 38.Half of 174 =
  39. 39.Half of 132 =
  40. 40.Half of 122 =

Answer key

  1. 128
  2. 66
  3. 102
  4. 76
  5. 67
  6. 136
  7. 97
  8. 59
  9. 148
  10. 168
  11. 16
  12. 41
  13. 43
  14. 186
  15. 73
  16. 110
  17. 11
  18. 44
  19. 142
  20. 118
  21. 49
  22. 93
  23. 71
  24. 22
  25. 21
  26. 74
  27. 88
  28. 78
  29. 172
  30. 51
  31. 162
  32. 96
  33. 36
  34. 156
  35. 98
  36. 48
  37. 86
  38. 87
  39. 66
  40. 61

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