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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 557 · 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 74 =
  2. 2.Double 25 =
  3. 3.Double 99 =
  4. 4.Half of 46 =
  5. 5.Double 78 =
  6. 6.Double 44 =
  7. 7.Double 11 =
  8. 8.Half of 152 =
  9. 9.Double 28 =
  10. 10.Half of 58 =
  11. 11.Double 41 =
  12. 12.Double 21 =
  13. 13.Half of 148 =
  14. 14.Double 37 =
  15. 15.Double 27 =
  16. 16.Double 14 =
  17. 17.Double 65 =
  18. 18.Half of 94 =
  19. 19.Double 94 =
  20. 20.Double 96 =
  21. 21.Double 67 =
  22. 22.Half of 118 =
  23. 23.Double 72 =
  24. 24.Double 59 =
  25. 25.Half of 92 =
  26. 26.Double 55 =
  27. 27.Half of 66 =
  28. 28.Double 35 =
  29. 29.Half of 64 =
  30. 30.Half of 68 =
  31. 31.Half of 192 =
  32. 32.Double 89 =
  33. 33.Double 61 =
  34. 34.Double 87 =
  35. 35.Double 51 =
  36. 36.Half of 28 =
  37. 37.Double 23 =
  38. 38.Double 57 =
  39. 39.Double 53 =
  40. 40.Half of 86 =

Answer key

  1. 148
  2. 50
  3. 198
  4. 23
  5. 156
  6. 88
  7. 22
  8. 76
  9. 56
  10. 29
  11. 82
  12. 42
  13. 74
  14. 74
  15. 54
  16. 28
  17. 130
  18. 47
  19. 188
  20. 192
  21. 134
  22. 59
  23. 144
  24. 118
  25. 46
  26. 110
  27. 33
  28. 70
  29. 32
  30. 34
  31. 96
  32. 178
  33. 122
  34. 174
  35. 102
  36. 14
  37. 46
  38. 114
  39. 106
  40. 43

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