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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 645 · 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 16 =
  2. 2.Double 75 =
  3. 3.Double 41 =
  4. 4.Double 57 =
  5. 5.Half of 52 =
  6. 6.Half of 38 =
  7. 7.Double 91 =
  8. 8.Half of 192 =
  9. 9.Half of 128 =
  10. 10.Half of 24 =
  11. 11.Half of 134 =
  12. 12.Half of 76 =
  13. 13.Double 74 =
  14. 14.Double 86 =
  15. 15.Double 58 =
  16. 16.Double 48 =
  17. 17.Double 76 =
  18. 18.Double 11 =
  19. 19.Double 39 =
  20. 20.Double 46 =
  21. 21.Half of 98 =
  22. 22.Double 53 =
  23. 23.Half of 124 =
  24. 24.Double 84 =
  25. 25.Half of 138 =
  26. 26.Half of 54 =
  27. 27.Double 65 =
  28. 28.Half of 56 =
  29. 29.Half of 142 =
  30. 30.Double 31 =
  31. 31.Half of 18 =
  32. 32.Double 26 =
  33. 33.Double 78 =
  34. 34.Double 79 =
  35. 35.Double 56 =
  36. 36.Double 42 =
  37. 37.Double 66 =
  38. 38.Half of 72 =
  39. 39.Double 19 =
  40. 40.Double 87 =

Answer key

  1. 32
  2. 150
  3. 82
  4. 114
  5. 26
  6. 19
  7. 182
  8. 96
  9. 64
  10. 12
  11. 67
  12. 38
  13. 148
  14. 172
  15. 116
  16. 96
  17. 152
  18. 22
  19. 78
  20. 92
  21. 49
  22. 106
  23. 62
  24. 168
  25. 69
  26. 27
  27. 130
  28. 28
  29. 71
  30. 62
  31. 9
  32. 52
  33. 156
  34. 158
  35. 112
  36. 84
  37. 132
  38. 36
  39. 38
  40. 174

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