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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 736 · 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 142 =
  2. 2.Double 17 =
  3. 3.Double 38 =
  4. 4.Half of 196 =
  5. 5.Double 41 =
  6. 6.Double 71 =
  7. 7.Double 66 =
  8. 8.Half of 58 =
  9. 9.Half of 62 =
  10. 10.Half of 98 =
  11. 11.Half of 114 =
  12. 12.Double 21 =
  13. 13.Half of 162 =
  14. 14.Half of 172 =
  15. 15.Half of 26 =
  16. 16.Half of 22 =
  17. 17.Double 31 =
  18. 18.Half of 64 =
  19. 19.Double 98 =
  20. 20.Double 58 =
  21. 21.Double 34 =
  22. 22.Half of 48 =
  23. 23.Half of 182 =
  24. 24.Double 49 =
  25. 25.Half of 168 =
  26. 26.Double 62 =
  27. 27.Half of 102 =
  28. 28.Half of 68 =
  29. 29.Double 43 =
  30. 30.Half of 38 =
  31. 31.Half of 54 =
  32. 32.Half of 72 =
  33. 33.Half of 152 =
  34. 34.Double 14 =
  35. 35.Double 33 =
  36. 36.Double 56 =
  37. 37.Double 54 =
  38. 38.Half of 176 =
  39. 39.Half of 134 =
  40. 40.Half of 198 =

Answer key

  1. 71
  2. 34
  3. 76
  4. 98
  5. 82
  6. 142
  7. 132
  8. 29
  9. 31
  10. 49
  11. 57
  12. 42
  13. 81
  14. 86
  15. 13
  16. 11
  17. 62
  18. 32
  19. 196
  20. 116
  21. 68
  22. 24
  23. 91
  24. 98
  25. 84
  26. 124
  27. 51
  28. 34
  29. 86
  30. 19
  31. 27
  32. 36
  33. 76
  34. 28
  35. 66
  36. 112
  37. 108
  38. 88
  39. 67
  40. 99

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