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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 837 · 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 82 =
  2. 2.Half of 24 =
  3. 3.Double 31 =
  4. 4.Double 36 =
  5. 5.Half of 148 =
  6. 6.Double 12 =
  7. 7.Double 55 =
  8. 8.Half of 182 =
  9. 9.Double 43 =
  10. 10.Double 78 =
  11. 11.Double 21 =
  12. 12.Half of 96 =
  13. 13.Double 92 =
  14. 14.Half of 136 =
  15. 15.Double 61 =
  16. 16.Double 23 =
  17. 17.Half of 102 =
  18. 18.Double 58 =
  19. 19.Double 56 =
  20. 20.Double 94 =
  21. 21.Half of 118 =
  22. 22.Double 52 =
  23. 23.Double 89 =
  24. 24.Half of 156 =
  25. 25.Double 51 =
  26. 26.Half of 142 =
  27. 27.Double 26 =
  28. 28.Half of 134 =
  29. 29.Half of 28 =
  30. 30.Double 25 =
  31. 31.Half of 72 =
  32. 32.Half of 32 =
  33. 33.Double 69 =
  34. 34.Double 97 =
  35. 35.Double 91 =
  36. 36.Double 66 =
  37. 37.Half of 18 =
  38. 38.Half of 64 =
  39. 39.Double 19 =
  40. 40.Half of 104 =

Answer key

  1. 41
  2. 12
  3. 62
  4. 72
  5. 74
  6. 24
  7. 110
  8. 91
  9. 86
  10. 156
  11. 42
  12. 48
  13. 184
  14. 68
  15. 122
  16. 46
  17. 51
  18. 116
  19. 112
  20. 188
  21. 59
  22. 104
  23. 178
  24. 78
  25. 102
  26. 71
  27. 52
  28. 67
  29. 14
  30. 50
  31. 36
  32. 16
  33. 138
  34. 194
  35. 182
  36. 132
  37. 9
  38. 32
  39. 38
  40. 52

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