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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 350 · 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.Half of 86 =
  2. 2.Double 97 =
  3. 3.Half of 102 =
  4. 4.Half of 142 =
  5. 5.Half of 92 =
  6. 6.Double 57 =
  7. 7.Half of 14 =
  8. 8.Half of 104 =
  9. 9.Double 78 =
  10. 10.Double 11 =
  11. 11.Double 51 =
  12. 12.Double 35 =
  13. 13.Double 74 =
  14. 14.Half of 192 =
  15. 15.Double 49 =
  16. 16.Double 24 =
  17. 17.Half of 12 =
  18. 18.Double 55 =
  19. 19.Half of 154 =
  20. 20.Half of 68 =
  21. 21.Double 81 =
  22. 22.Half of 78 =
  23. 23.Half of 132 =
  24. 24.Double 44 =
  25. 25.Double 61 =
  26. 26.Double 48 =
  27. 27.Double 72 =
  28. 28.Half of 152 =
  29. 29.Double 42 =
  30. 30.Half of 52 =
  31. 31.Half of 146 =
  32. 32.Half of 38 =
  33. 33.Double 59 =
  34. 34.Half of 58 =
  35. 35.Half of 112 =
  36. 36.Half of 72 =
  37. 37.Half of 136 =
  38. 38.Half of 148 =
  39. 39.Double 91 =
  40. 40.Double 14 =

Answer key

  1. 43
  2. 194
  3. 51
  4. 71
  5. 46
  6. 114
  7. 7
  8. 52
  9. 156
  10. 22
  11. 102
  12. 70
  13. 148
  14. 96
  15. 98
  16. 48
  17. 6
  18. 110
  19. 77
  20. 34
  21. 162
  22. 39
  23. 66
  24. 88
  25. 122
  26. 96
  27. 144
  28. 76
  29. 84
  30. 26
  31. 73
  32. 19
  33. 118
  34. 29
  35. 56
  36. 36
  37. 68
  38. 74
  39. 182
  40. 28

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