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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 207 · 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 128 =
  2. 2.Half of 92 =
  3. 3.Double 72 =
  4. 4.Double 18 =
  5. 5.Double 61 =
  6. 6.Half of 194 =
  7. 7.Double 58 =
  8. 8.Double 51 =
  9. 9.Double 64 =
  10. 10.Double 87 =
  11. 11.Half of 192 =
  12. 12.Half of 48 =
  13. 13.Double 89 =
  14. 14.Double 49 =
  15. 15.Half of 38 =
  16. 16.Half of 98 =
  17. 17.Double 93 =
  18. 18.Half of 46 =
  19. 19.Half of 64 =
  20. 20.Double 56 =
  21. 21.Half of 148 =
  22. 22.Double 71 =
  23. 23.Double 54 =
  24. 24.Double 24 =
  25. 25.Half of 114 =
  26. 26.Half of 152 =
  27. 27.Double 69 =
  28. 28.Double 66 =
  29. 29.Half of 44 =
  30. 30.Double 48 =
  31. 31.Half of 62 =
  32. 32.Double 26 =
  33. 33.Double 95 =
  34. 34.Half of 58 =
  35. 35.Half of 42 =
  36. 36.Half of 146 =
  37. 37.Double 99 =
  38. 38.Double 62 =
  39. 39.Double 17 =
  40. 40.Half of 76 =

Answer key

  1. 64
  2. 46
  3. 144
  4. 36
  5. 122
  6. 97
  7. 116
  8. 102
  9. 128
  10. 174
  11. 96
  12. 24
  13. 178
  14. 98
  15. 19
  16. 49
  17. 186
  18. 23
  19. 32
  20. 112
  21. 74
  22. 142
  23. 108
  24. 48
  25. 57
  26. 76
  27. 138
  28. 132
  29. 22
  30. 96
  31. 31
  32. 52
  33. 190
  34. 29
  35. 21
  36. 73
  37. 198
  38. 124
  39. 34
  40. 38

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