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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 608 · 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 55 =
  3. 3.Double 84 =
  4. 4.Half of 124 =
  5. 5.Double 87 =
  6. 6.Half of 142 =
  7. 7.Half of 114 =
  8. 8.Double 32 =
  9. 9.Half of 152 =
  10. 10.Double 21 =
  11. 11.Half of 78 =
  12. 12.Double 61 =
  13. 13.Half of 162 =
  14. 14.Double 64 =
  15. 15.Half of 132 =
  16. 16.Half of 118 =
  17. 17.Double 29 =
  18. 18.Half of 42 =
  19. 19.Half of 54 =
  20. 20.Half of 18 =
  21. 21.Double 15 =
  22. 22.Half of 186 =
  23. 23.Half of 112 =
  24. 24.Double 19 =
  25. 25.Double 63 =
  26. 26.Double 23 =
  27. 27.Half of 64 =
  28. 28.Double 26 =
  29. 29.Half of 154 =
  30. 30.Double 82 =
  31. 31.Half of 136 =
  32. 32.Half of 122 =
  33. 33.Double 16 =
  34. 34.Double 28 =
  35. 35.Half of 128 =
  36. 36.Double 47 =
  37. 37.Half of 72 =
  38. 38.Half of 146 =
  39. 39.Double 89 =
  40. 40.Double 72 =

Answer key

  1. 118
  2. 110
  3. 168
  4. 62
  5. 174
  6. 71
  7. 57
  8. 64
  9. 76
  10. 42
  11. 39
  12. 122
  13. 81
  14. 128
  15. 66
  16. 59
  17. 58
  18. 21
  19. 27
  20. 9
  21. 30
  22. 93
  23. 56
  24. 38
  25. 126
  26. 46
  27. 32
  28. 52
  29. 77
  30. 164
  31. 68
  32. 61
  33. 32
  34. 56
  35. 64
  36. 94
  37. 36
  38. 73
  39. 178
  40. 144

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