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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 801 · 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 78 =
  2. 2.Double 44 =
  3. 3.Double 49 =
  4. 4.Half of 46 =
  5. 5.Double 51 =
  6. 6.Half of 152 =
  7. 7.Double 84 =
  8. 8.Double 11 =
  9. 9.Double 27 =
  10. 10.Double 72 =
  11. 11.Double 12 =
  12. 12.Half of 82 =
  13. 13.Double 29 =
  14. 14.Half of 24 =
  15. 15.Half of 36 =
  16. 16.Double 26 =
  17. 17.Double 81 =
  18. 18.Double 56 =
  19. 19.Double 34 =
  20. 20.Double 58 =
  21. 21.Double 75 =
  22. 22.Double 22 =
  23. 23.Double 52 =
  24. 24.Half of 158 =
  25. 25.Half of 172 =
  26. 26.Half of 118 =
  27. 27.Half of 122 =
  28. 28.Double 61 =
  29. 29.Double 96 =
  30. 30.Double 42 =
  31. 31.Half of 142 =
  32. 32.Half of 102 =
  33. 33.Double 98 =
  34. 34.Half of 114 =
  35. 35.Half of 92 =
  36. 36.Half of 176 =
  37. 37.Half of 62 =
  38. 38.Double 43 =
  39. 39.Half of 88 =
  40. 40.Double 57 =

Answer key

  1. 156
  2. 88
  3. 98
  4. 23
  5. 102
  6. 76
  7. 168
  8. 22
  9. 54
  10. 144
  11. 24
  12. 41
  13. 58
  14. 12
  15. 18
  16. 52
  17. 162
  18. 112
  19. 68
  20. 116
  21. 150
  22. 44
  23. 104
  24. 79
  25. 86
  26. 59
  27. 61
  28. 122
  29. 192
  30. 84
  31. 71
  32. 51
  33. 196
  34. 57
  35. 46
  36. 88
  37. 31
  38. 86
  39. 44
  40. 114

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