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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 330 · 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 44 =
  2. 2.Half of 122 =
  3. 3.Double 67 =
  4. 4.Double 65 =
  5. 5.Double 92 =
  6. 6.Half of 192 =
  7. 7.Half of 52 =
  8. 8.Half of 108 =
  9. 9.Double 72 =
  10. 10.Double 96 =
  11. 11.Half of 84 =
  12. 12.Double 29 =
  13. 13.Double 79 =
  14. 14.Double 51 =
  15. 15.Half of 88 =
  16. 16.Half of 56 =
  17. 17.Half of 112 =
  18. 18.Half of 64 =
  19. 19.Double 48 =
  20. 20.Double 27 =
  21. 21.Double 58 =
  22. 22.Half of 152 =
  23. 23.Half of 168 =
  24. 24.Double 74 =
  25. 25.Half of 72 =
  26. 26.Half of 162 =
  27. 27.Half of 26 =
  28. 28.Half of 158 =
  29. 29.Half of 178 =
  30. 30.Half of 182 =
  31. 31.Double 36 =
  32. 32.Half of 194 =
  33. 33.Double 17 =
  34. 34.Half of 36 =
  35. 35.Half of 62 =
  36. 36.Half of 12 =
  37. 37.Double 12 =
  38. 38.Half of 32 =
  39. 39.Double 11 =
  40. 40.Double 25 =

Answer key

  1. 88
  2. 61
  3. 134
  4. 130
  5. 184
  6. 96
  7. 26
  8. 54
  9. 144
  10. 192
  11. 42
  12. 58
  13. 158
  14. 102
  15. 44
  16. 28
  17. 56
  18. 32
  19. 96
  20. 54
  21. 116
  22. 76
  23. 84
  24. 148
  25. 36
  26. 81
  27. 13
  28. 79
  29. 89
  30. 91
  31. 72
  32. 97
  33. 34
  34. 18
  35. 31
  36. 6
  37. 24
  38. 16
  39. 22
  40. 50

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