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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 269 · 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 18 =
  2. 2.Half of 162 =
  3. 3.Double 41 =
  4. 4.Double 39 =
  5. 5.Double 25 =
  6. 6.Double 64 =
  7. 7.Double 48 =
  8. 8.Double 95 =
  9. 9.Half of 44 =
  10. 10.Double 71 =
  11. 11.Double 34 =
  12. 12.Half of 192 =
  13. 13.Half of 76 =
  14. 14.Double 93 =
  15. 15.Half of 68 =
  16. 16.Half of 18 =
  17. 17.Double 45 =
  18. 18.Half of 46 =
  19. 19.Double 16 =
  20. 20.Double 19 =
  21. 21.Double 97 =
  22. 22.Double 79 =
  23. 23.Half of 148 =
  24. 24.Double 23 =
  25. 25.Half of 152 =
  26. 26.Half of 178 =
  27. 27.Double 31 =
  28. 28.Half of 88 =
  29. 29.Half of 34 =
  30. 30.Double 99 =
  31. 31.Half of 176 =
  32. 32.Double 58 =
  33. 33.Half of 42 =
  34. 34.Double 14 =
  35. 35.Double 36 =
  36. 36.Double 51 =
  37. 37.Double 67 =
  38. 38.Double 13 =
  39. 39.Half of 52 =
  40. 40.Half of 12 =

Answer key

  1. 36
  2. 81
  3. 82
  4. 78
  5. 50
  6. 128
  7. 96
  8. 190
  9. 22
  10. 142
  11. 68
  12. 96
  13. 38
  14. 186
  15. 34
  16. 9
  17. 90
  18. 23
  19. 32
  20. 38
  21. 194
  22. 158
  23. 74
  24. 46
  25. 76
  26. 89
  27. 62
  28. 44
  29. 17
  30. 198
  31. 88
  32. 116
  33. 21
  34. 28
  35. 72
  36. 102
  37. 134
  38. 26
  39. 26
  40. 6

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