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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 213 · 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 49 =
  2. 2.Double 74 =
  3. 3.Half of 168 =
  4. 4.Half of 146 =
  5. 5.Half of 102 =
  6. 6.Half of 112 =
  7. 7.Double 34 =
  8. 8.Double 68 =
  9. 9.Double 93 =
  10. 10.Half of 14 =
  11. 11.Half of 72 =
  12. 12.Double 25 =
  13. 13.Half of 86 =
  14. 14.Half of 42 =
  15. 15.Double 29 =
  16. 16.Double 35 =
  17. 17.Double 28 =
  18. 18.Half of 108 =
  19. 19.Double 58 =
  20. 20.Double 77 =
  21. 21.Double 26 =
  22. 22.Double 52 =
  23. 23.Half of 132 =
  24. 24.Half of 68 =
  25. 25.Half of 82 =
  26. 26.Half of 134 =
  27. 27.Half of 192 =
  28. 28.Half of 74 =
  29. 29.Half of 136 =
  30. 30.Double 76 =
  31. 31.Half of 152 =
  32. 32.Half of 48 =
  33. 33.Double 64 =
  34. 34.Double 38 =
  35. 35.Half of 64 =
  36. 36.Half of 142 =
  37. 37.Double 47 =
  38. 38.Half of 92 =
  39. 39.Double 62 =
  40. 40.Half of 128 =

Answer key

  1. 98
  2. 148
  3. 84
  4. 73
  5. 51
  6. 56
  7. 68
  8. 136
  9. 186
  10. 7
  11. 36
  12. 50
  13. 43
  14. 21
  15. 58
  16. 70
  17. 56
  18. 54
  19. 116
  20. 154
  21. 52
  22. 104
  23. 66
  24. 34
  25. 41
  26. 67
  27. 96
  28. 37
  29. 68
  30. 152
  31. 76
  32. 24
  33. 128
  34. 76
  35. 32
  36. 71
  37. 94
  38. 46
  39. 124
  40. 64

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