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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 176 · 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 126 =
  2. 2.Double 14 =
  3. 3.Double 61 =
  4. 4.Double 88 =
  5. 5.Half of 66 =
  6. 6.Double 74 =
  7. 7.Double 92 =
  8. 8.Double 47 =
  9. 9.Double 33 =
  10. 10.Double 94 =
  11. 11.Double 89 =
  12. 12.Double 85 =
  13. 13.Double 67 =
  14. 14.Half of 72 =
  15. 15.Double 39 =
  16. 16.Double 32 =
  17. 17.Double 99 =
  18. 18.Double 19 =
  19. 19.Double 41 =
  20. 20.Double 11 =
  21. 21.Half of 56 =
  22. 22.Double 27 =
  23. 23.Double 24 =
  24. 24.Half of 132 =
  25. 25.Half of 42 =
  26. 26.Half of 158 =
  27. 27.Half of 196 =
  28. 28.Double 22 =
  29. 29.Half of 38 =
  30. 30.Double 13 =
  31. 31.Double 21 =
  32. 32.Half of 156 =
  33. 33.Double 87 =
  34. 34.Double 68 =
  35. 35.Double 71 =
  36. 36.Half of 188 =
  37. 37.Double 36 =
  38. 38.Half of 122 =
  39. 39.Double 59 =
  40. 40.Double 46 =

Answer key

  1. 63
  2. 28
  3. 122
  4. 176
  5. 33
  6. 148
  7. 184
  8. 94
  9. 66
  10. 188
  11. 178
  12. 170
  13. 134
  14. 36
  15. 78
  16. 64
  17. 198
  18. 38
  19. 82
  20. 22
  21. 28
  22. 54
  23. 48
  24. 66
  25. 21
  26. 79
  27. 98
  28. 44
  29. 19
  30. 26
  31. 42
  32. 78
  33. 174
  34. 136
  35. 142
  36. 94
  37. 72
  38. 61
  39. 118
  40. 92

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