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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 543 · 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 59 =
  2. 2.Double 78 =
  3. 3.Half of 158 =
  4. 4.Half of 162 =
  5. 5.Half of 182 =
  6. 6.Half of 172 =
  7. 7.Double 51 =
  8. 8.Double 71 =
  9. 9.Half of 136 =
  10. 10.Double 57 =
  11. 11.Half of 42 =
  12. 12.Double 85 =
  13. 13.Double 61 =
  14. 14.Double 98 =
  15. 15.Half of 106 =
  16. 16.Double 95 =
  17. 17.Double 84 =
  18. 18.Half of 88 =
  19. 19.Half of 74 =
  20. 20.Double 28 =
  21. 21.Half of 178 =
  22. 22.Half of 54 =
  23. 23.Double 17 =
  24. 24.Double 37 =
  25. 25.Double 53 =
  26. 26.Double 41 =
  27. 27.Half of 62 =
  28. 28.Double 56 =
  29. 29.Half of 186 =
  30. 30.Half of 156 =
  31. 31.Double 76 =
  32. 32.Half of 72 =
  33. 33.Double 52 =
  34. 34.Double 35 =
  35. 35.Double 23 =
  36. 36.Half of 64 =
  37. 37.Half of 104 =
  38. 38.Half of 126 =
  39. 39.Half of 92 =
  40. 40.Double 21 =

Answer key

  1. 118
  2. 156
  3. 79
  4. 81
  5. 91
  6. 86
  7. 102
  8. 142
  9. 68
  10. 114
  11. 21
  12. 170
  13. 122
  14. 196
  15. 53
  16. 190
  17. 168
  18. 44
  19. 37
  20. 56
  21. 89
  22. 27
  23. 34
  24. 74
  25. 106
  26. 82
  27. 31
  28. 112
  29. 93
  30. 78
  31. 152
  32. 36
  33. 104
  34. 70
  35. 46
  36. 32
  37. 52
  38. 63
  39. 46
  40. 42

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