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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 40 · 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 22 =
  2. 2.Half of 134 =
  3. 3.Double 38 =
  4. 4.Half of 38 =
  5. 5.Double 86 =
  6. 6.Double 91 =
  7. 7.Half of 108 =
  8. 8.Double 16 =
  9. 9.Half of 52 =
  10. 10.Half of 82 =
  11. 11.Half of 84 =
  12. 12.Double 29 =
  13. 13.Half of 54 =
  14. 14.Double 73 =
  15. 15.Half of 62 =
  16. 16.Half of 58 =
  17. 17.Half of 132 =
  18. 18.Double 87 =
  19. 19.Half of 148 =
  20. 20.Double 51 =
  21. 21.Double 23 =
  22. 22.Double 14 =
  23. 23.Double 42 =
  24. 24.Double 17 =
  25. 25.Half of 32 =
  26. 26.Half of 76 =
  27. 27.Double 21 =
  28. 28.Double 78 =
  29. 29.Double 88 =
  30. 30.Double 65 =
  31. 31.Half of 68 =
  32. 32.Double 68 =
  33. 33.Double 63 =
  34. 34.Half of 144 =
  35. 35.Half of 182 =
  36. 36.Half of 86 =
  37. 37.Double 85 =
  38. 38.Double 11 =
  39. 39.Double 79 =
  40. 40.Double 98 =

Answer key

  1. 11
  2. 67
  3. 76
  4. 19
  5. 172
  6. 182
  7. 54
  8. 32
  9. 26
  10. 41
  11. 42
  12. 58
  13. 27
  14. 146
  15. 31
  16. 29
  17. 66
  18. 174
  19. 74
  20. 102
  21. 46
  22. 28
  23. 84
  24. 34
  25. 16
  26. 38
  27. 42
  28. 156
  29. 176
  30. 130
  31. 34
  32. 136
  33. 126
  34. 72
  35. 91
  36. 43
  37. 170
  38. 22
  39. 158
  40. 196

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