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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 680 · 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 32 =
  2. 2.Double 51 =
  3. 3.Half of 56 =
  4. 4.Double 88 =
  5. 5.Half of 16 =
  6. 6.Double 22 =
  7. 7.Half of 14 =
  8. 8.Double 52 =
  9. 9.Double 17 =
  10. 10.Half of 136 =
  11. 11.Double 55 =
  12. 12.Double 33 =
  13. 13.Double 64 =
  14. 14.Half of 74 =
  15. 15.Half of 128 =
  16. 16.Double 25 =
  17. 17.Double 21 =
  18. 18.Double 72 =
  19. 19.Double 13 =
  20. 20.Half of 62 =
  21. 21.Half of 26 =
  22. 22.Half of 82 =
  23. 23.Half of 172 =
  24. 24.Double 93 =
  25. 25.Double 81 =
  26. 26.Half of 178 =
  27. 27.Half of 198 =
  28. 28.Half of 134 =
  29. 29.Double 94 =
  30. 30.Half of 52 =
  31. 31.Double 69 =
  32. 32.Double 85 =
  33. 33.Double 87 =
  34. 34.Half of 22 =
  35. 35.Double 27 =
  36. 36.Double 98 =
  37. 37.Double 14 =
  38. 38.Half of 92 =
  39. 39.Half of 142 =
  40. 40.Double 91 =

Answer key

  1. 16
  2. 102
  3. 28
  4. 176
  5. 8
  6. 44
  7. 7
  8. 104
  9. 34
  10. 68
  11. 110
  12. 66
  13. 128
  14. 37
  15. 64
  16. 50
  17. 42
  18. 144
  19. 26
  20. 31
  21. 13
  22. 41
  23. 86
  24. 186
  25. 162
  26. 89
  27. 99
  28. 67
  29. 188
  30. 26
  31. 138
  32. 170
  33. 174
  34. 11
  35. 54
  36. 196
  37. 28
  38. 46
  39. 71
  40. 182

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