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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 805 · 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 32 =
  2. 2.Half of 102 =
  3. 3.Double 11 =
  4. 4.Half of 44 =
  5. 5.Double 23 =
  6. 6.Double 52 =
  7. 7.Half of 194 =
  8. 8.Double 15 =
  9. 9.Half of 136 =
  10. 10.Double 33 =
  11. 11.Double 92 =
  12. 12.Double 32 =
  13. 13.Half of 98 =
  14. 14.Half of 142 =
  15. 15.Double 59 =
  16. 16.Double 81 =
  17. 17.Double 21 =
  18. 18.Half of 106 =
  19. 19.Half of 84 =
  20. 20.Double 71 =
  21. 21.Half of 192 =
  22. 22.Half of 48 =
  23. 23.Double 57 =
  24. 24.Half of 52 =
  25. 25.Half of 148 =
  26. 26.Double 68 =
  27. 27.Double 97 =
  28. 28.Double 67 =
  29. 29.Double 48 =
  30. 30.Double 72 =
  31. 31.Half of 112 =
  32. 32.Half of 64 =
  33. 33.Double 46 =
  34. 34.Double 87 =
  35. 35.Double 53 =
  36. 36.Half of 22 =
  37. 37.Half of 158 =
  38. 38.Double 74 =
  39. 39.Double 36 =
  40. 40.Half of 138 =

Answer key

  1. 16
  2. 51
  3. 22
  4. 22
  5. 46
  6. 104
  7. 97
  8. 30
  9. 68
  10. 66
  11. 184
  12. 64
  13. 49
  14. 71
  15. 118
  16. 162
  17. 42
  18. 53
  19. 42
  20. 142
  21. 96
  22. 24
  23. 114
  24. 26
  25. 74
  26. 136
  27. 194
  28. 134
  29. 96
  30. 144
  31. 56
  32. 32
  33. 92
  34. 174
  35. 106
  36. 11
  37. 79
  38. 148
  39. 72
  40. 69

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