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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 319 · 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 76 =
  2. 2.Double 65 =
  3. 3.Double 79 =
  4. 4.Half of 18 =
  5. 5.Double 48 =
  6. 6.Double 86 =
  7. 7.Double 31 =
  8. 8.Half of 12 =
  9. 9.Half of 182 =
  10. 10.Half of 116 =
  11. 11.Double 18 =
  12. 12.Double 29 =
  13. 13.Half of 122 =
  14. 14.Double 94 =
  15. 15.Double 47 =
  16. 16.Half of 188 =
  17. 17.Half of 186 =
  18. 18.Double 92 =
  19. 19.Half of 52 =
  20. 20.Half of 142 =
  21. 21.Double 76 =
  22. 22.Double 56 =
  23. 23.Half of 42 =
  24. 24.Half of 154 =
  25. 25.Double 53 =
  26. 26.Double 27 =
  27. 27.Double 34 =
  28. 28.Double 81 =
  29. 29.Double 58 =
  30. 30.Double 22 =
  31. 31.Half of 136 =
  32. 32.Half of 56 =
  33. 33.Double 32 =
  34. 34.Double 57 =
  35. 35.Double 74 =
  36. 36.Half of 192 =
  37. 37.Double 37 =
  38. 38.Double 98 =
  39. 39.Half of 106 =
  40. 40.Double 21 =

Answer key

  1. 38
  2. 130
  3. 158
  4. 9
  5. 96
  6. 172
  7. 62
  8. 6
  9. 91
  10. 58
  11. 36
  12. 58
  13. 61
  14. 188
  15. 94
  16. 94
  17. 93
  18. 184
  19. 26
  20. 71
  21. 152
  22. 112
  23. 21
  24. 77
  25. 106
  26. 54
  27. 68
  28. 162
  29. 116
  30. 44
  31. 68
  32. 28
  33. 64
  34. 114
  35. 148
  36. 96
  37. 74
  38. 196
  39. 53
  40. 42

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