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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 717 · 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 85 =
  2. 2.Double 57 =
  3. 3.Double 64 =
  4. 4.Double 99 =
  5. 5.Double 61 =
  6. 6.Double 59 =
  7. 7.Half of 118 =
  8. 8.Half of 52 =
  9. 9.Half of 186 =
  10. 10.Half of 112 =
  11. 11.Half of 102 =
  12. 12.Half of 122 =
  13. 13.Half of 104 =
  14. 14.Double 51 =
  15. 15.Half of 146 =
  16. 16.Double 78 =
  17. 17.Double 53 =
  18. 18.Half of 162 =
  19. 19.Half of 54 =
  20. 20.Half of 68 =
  21. 21.Double 22 =
  22. 22.Half of 168 =
  23. 23.Half of 126 =
  24. 24.Double 88 =
  25. 25.Double 47 =
  26. 26.Half of 132 =
  27. 27.Half of 48 =
  28. 28.Half of 182 =
  29. 29.Double 21 =
  30. 30.Half of 44 =
  31. 31.Half of 28 =
  32. 32.Double 37 =
  33. 33.Half of 116 =
  34. 34.Double 19 =
  35. 35.Double 13 =
  36. 36.Half of 152 =
  37. 37.Double 41 =
  38. 38.Half of 36 =
  39. 39.Half of 84 =
  40. 40.Double 98 =

Answer key

  1. 170
  2. 114
  3. 128
  4. 198
  5. 122
  6. 118
  7. 59
  8. 26
  9. 93
  10. 56
  11. 51
  12. 61
  13. 52
  14. 102
  15. 73
  16. 156
  17. 106
  18. 81
  19. 27
  20. 34
  21. 44
  22. 84
  23. 63
  24. 176
  25. 94
  26. 66
  27. 24
  28. 91
  29. 42
  30. 22
  31. 14
  32. 74
  33. 58
  34. 38
  35. 26
  36. 76
  37. 82
  38. 18
  39. 42
  40. 196

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