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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 516 · 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 31 =
  2. 2.Double 51 =
  3. 3.Half of 176 =
  4. 4.Half of 42 =
  5. 5.Double 58 =
  6. 6.Half of 94 =
  7. 7.Half of 78 =
  8. 8.Half of 154 =
  9. 9.Half of 36 =
  10. 10.Half of 56 =
  11. 11.Half of 86 =
  12. 12.Double 99 =
  13. 13.Double 88 =
  14. 14.Half of 144 =
  15. 15.Half of 88 =
  16. 16.Half of 46 =
  17. 17.Half of 58 =
  18. 18.Double 22 =
  19. 19.Half of 196 =
  20. 20.Double 39 =
  21. 21.Half of 194 =
  22. 22.Double 27 =
  23. 23.Double 25 =
  24. 24.Double 28 =
  25. 25.Half of 124 =
  26. 26.Double 15 =
  27. 27.Double 94 =
  28. 28.Half of 64 =
  29. 29.Double 33 =
  30. 30.Double 62 =
  31. 31.Half of 158 =
  32. 32.Half of 68 =
  33. 33.Half of 72 =
  34. 34.Double 76 =
  35. 35.Double 69 =
  36. 36.Half of 168 =
  37. 37.Double 74 =
  38. 38.Half of 112 =
  39. 39.Double 82 =
  40. 40.Half of 66 =

Answer key

  1. 62
  2. 102
  3. 88
  4. 21
  5. 116
  6. 47
  7. 39
  8. 77
  9. 18
  10. 28
  11. 43
  12. 198
  13. 176
  14. 72
  15. 44
  16. 23
  17. 29
  18. 44
  19. 98
  20. 78
  21. 97
  22. 54
  23. 50
  24. 56
  25. 62
  26. 30
  27. 188
  28. 32
  29. 66
  30. 124
  31. 79
  32. 34
  33. 36
  34. 152
  35. 138
  36. 84
  37. 148
  38. 56
  39. 164
  40. 33

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