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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 606 · 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 31 =
  2. 2.Half of 124 =
  3. 3.Half of 132 =
  4. 4.Half of 88 =
  5. 5.Double 56 =
  6. 6.Half of 14 =
  7. 7.Half of 58 =
  8. 8.Double 21 =
  9. 9.Double 97 =
  10. 10.Double 72 =
  11. 11.Double 77 =
  12. 12.Half of 62 =
  13. 13.Double 17 =
  14. 14.Double 87 =
  15. 15.Double 23 =
  16. 16.Double 68 =
  17. 17.Double 47 =
  18. 18.Double 78 =
  19. 19.Half of 102 =
  20. 20.Double 71 =
  21. 21.Double 73 =
  22. 22.Double 74 =
  23. 23.Half of 172 =
  24. 24.Half of 64 =
  25. 25.Double 76 =
  26. 26.Double 69 =
  27. 27.Half of 42 =
  28. 28.Half of 178 =
  29. 29.Double 43 =
  30. 30.Double 48 =
  31. 31.Double 14 =
  32. 32.Double 22 =
  33. 33.Half of 136 =
  34. 34.Double 89 =
  35. 35.Double 86 =
  36. 36.Half of 66 =
  37. 37.Double 41 =
  38. 38.Double 53 =
  39. 39.Double 28 =
  40. 40.Double 29 =

Answer key

  1. 62
  2. 62
  3. 66
  4. 44
  5. 112
  6. 7
  7. 29
  8. 42
  9. 194
  10. 144
  11. 154
  12. 31
  13. 34
  14. 174
  15. 46
  16. 136
  17. 94
  18. 156
  19. 51
  20. 142
  21. 146
  22. 148
  23. 86
  24. 32
  25. 152
  26. 138
  27. 21
  28. 89
  29. 86
  30. 96
  31. 28
  32. 44
  33. 68
  34. 178
  35. 172
  36. 33
  37. 82
  38. 106
  39. 56
  40. 58

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