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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 265 · 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 87 =
  2. 2.Double 51 =
  3. 3.Double 42 =
  4. 4.Half of 22 =
  5. 5.Double 86 =
  6. 6.Half of 84 =
  7. 7.Half of 58 =
  8. 8.Double 22 =
  9. 9.Double 66 =
  10. 10.Half of 162 =
  11. 11.Half of 142 =
  12. 12.Double 94 =
  13. 13.Half of 96 =
  14. 14.Double 67 =
  15. 15.Half of 36 =
  16. 16.Half of 146 =
  17. 17.Double 95 =
  18. 18.Half of 194 =
  19. 19.Double 76 =
  20. 20.Double 65 =
  21. 21.Half of 42 =
  22. 22.Half of 132 =
  23. 23.Double 53 =
  24. 24.Double 31 =
  25. 25.Double 88 =
  26. 26.Double 47 =
  27. 27.Half of 134 =
  28. 28.Double 16 =
  29. 29.Double 49 =
  30. 30.Double 62 =
  31. 31.Half of 54 =
  32. 32.Double 34 =
  33. 33.Half of 76 =
  34. 34.Half of 112 =
  35. 35.Half of 48 =
  36. 36.Half of 38 =
  37. 37.Double 58 =
  38. 38.Double 41 =
  39. 39.Double 28 =
  40. 40.Double 54 =

Answer key

  1. 174
  2. 102
  3. 84
  4. 11
  5. 172
  6. 42
  7. 29
  8. 44
  9. 132
  10. 81
  11. 71
  12. 188
  13. 48
  14. 134
  15. 18
  16. 73
  17. 190
  18. 97
  19. 152
  20. 130
  21. 21
  22. 66
  23. 106
  24. 62
  25. 176
  26. 94
  27. 67
  28. 32
  29. 98
  30. 124
  31. 27
  32. 68
  33. 38
  34. 56
  35. 24
  36. 19
  37. 116
  38. 82
  39. 56
  40. 108

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