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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 177 · 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 91 =
  2. 2.Double 27 =
  3. 3.Double 31 =
  4. 4.Half of 132 =
  5. 5.Half of 98 =
  6. 6.Half of 188 =
  7. 7.Half of 182 =
  8. 8.Double 21 =
  9. 9.Half of 102 =
  10. 10.Double 41 =
  11. 11.Double 26 =
  12. 12.Double 98 =
  13. 13.Half of 14 =
  14. 14.Half of 94 =
  15. 15.Double 17 =
  16. 16.Double 68 =
  17. 17.Half of 76 =
  18. 18.Double 63 =
  19. 19.Double 94 =
  20. 20.Half of 86 =
  21. 21.Double 65 =
  22. 22.Double 61 =
  23. 23.Half of 22 =
  24. 24.Half of 72 =
  25. 25.Double 72 =
  26. 26.Double 13 =
  27. 27.Double 36 =
  28. 28.Double 66 =
  29. 29.Double 15 =
  30. 30.Double 47 =
  31. 31.Double 32 =
  32. 32.Double 55 =
  33. 33.Double 35 =
  34. 34.Double 73 =
  35. 35.Half of 128 =
  36. 36.Double 83 =
  37. 37.Double 23 =
  38. 38.Double 59 =
  39. 39.Double 89 =
  40. 40.Half of 24 =

Answer key

  1. 182
  2. 54
  3. 62
  4. 66
  5. 49
  6. 94
  7. 91
  8. 42
  9. 51
  10. 82
  11. 52
  12. 196
  13. 7
  14. 47
  15. 34
  16. 136
  17. 38
  18. 126
  19. 188
  20. 43
  21. 130
  22. 122
  23. 11
  24. 36
  25. 144
  26. 26
  27. 72
  28. 132
  29. 30
  30. 94
  31. 64
  32. 110
  33. 70
  34. 146
  35. 64
  36. 166
  37. 46
  38. 118
  39. 178
  40. 12

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