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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 571 · 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 46 =
  2. 2.Double 67 =
  3. 3.Double 63 =
  4. 4.Double 74 =
  5. 5.Double 48 =
  6. 6.Half of 182 =
  7. 7.Double 49 =
  8. 8.Double 34 =
  9. 9.Double 35 =
  10. 10.Double 57 =
  11. 11.Half of 198 =
  12. 12.Double 16 =
  13. 13.Double 39 =
  14. 14.Half of 58 =
  15. 15.Double 43 =
  16. 16.Double 58 =
  17. 17.Half of 54 =
  18. 18.Half of 118 =
  19. 19.Double 86 =
  20. 20.Double 23 =
  21. 21.Half of 196 =
  22. 22.Half of 144 =
  23. 23.Half of 192 =
  24. 24.Half of 116 =
  25. 25.Half of 172 =
  26. 26.Double 56 =
  27. 27.Half of 34 =
  28. 28.Half of 136 =
  29. 29.Double 61 =
  30. 30.Half of 122 =
  31. 31.Half of 158 =
  32. 32.Double 31 =
  33. 33.Half of 14 =
  34. 34.Half of 78 =
  35. 35.Double 24 =
  36. 36.Double 44 =
  37. 37.Half of 92 =
  38. 38.Double 32 =
  39. 39.Half of 52 =
  40. 40.Double 13 =

Answer key

  1. 23
  2. 134
  3. 126
  4. 148
  5. 96
  6. 91
  7. 98
  8. 68
  9. 70
  10. 114
  11. 99
  12. 32
  13. 78
  14. 29
  15. 86
  16. 116
  17. 27
  18. 59
  19. 172
  20. 46
  21. 98
  22. 72
  23. 96
  24. 58
  25. 86
  26. 112
  27. 17
  28. 68
  29. 122
  30. 61
  31. 79
  32. 62
  33. 7
  34. 39
  35. 48
  36. 88
  37. 46
  38. 64
  39. 26
  40. 26

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