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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 550 · 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 63 =
  2. 2.Half of 162 =
  3. 3.Half of 92 =
  4. 4.Half of 16 =
  5. 5.Double 96 =
  6. 6.Half of 58 =
  7. 7.Double 42 =
  8. 8.Half of 188 =
  9. 9.Half of 62 =
  10. 10.Double 69 =
  11. 11.Double 99 =
  12. 12.Double 41 =
  13. 13.Half of 172 =
  14. 14.Double 86 =
  15. 15.Half of 56 =
  16. 16.Double 26 =
  17. 17.Half of 72 =
  18. 18.Double 38 =
  19. 19.Half of 184 =
  20. 20.Half of 114 =
  21. 21.Double 52 =
  22. 22.Double 47 =
  23. 23.Double 32 =
  24. 24.Half of 132 =
  25. 25.Double 12 =
  26. 26.Double 98 =
  27. 27.Double 71 =
  28. 28.Double 48 =
  29. 29.Double 81 =
  30. 30.Double 84 =
  31. 31.Double 27 =
  32. 32.Half of 112 =
  33. 33.Double 67 =
  34. 34.Double 59 =
  35. 35.Half of 86 =
  36. 36.Double 91 =
  37. 37.Double 23 =
  38. 38.Double 13 =
  39. 39.Double 31 =
  40. 40.Half of 118 =

Answer key

  1. 126
  2. 81
  3. 46
  4. 8
  5. 192
  6. 29
  7. 84
  8. 94
  9. 31
  10. 138
  11. 198
  12. 82
  13. 86
  14. 172
  15. 28
  16. 52
  17. 36
  18. 76
  19. 92
  20. 57
  21. 104
  22. 94
  23. 64
  24. 66
  25. 24
  26. 196
  27. 142
  28. 96
  29. 162
  30. 168
  31. 54
  32. 56
  33. 134
  34. 118
  35. 43
  36. 182
  37. 46
  38. 26
  39. 62
  40. 59

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