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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 46 · 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 27 =
  2. 2.Double 31 =
  3. 3.Half of 26 =
  4. 4.Double 26 =
  5. 5.Double 98 =
  6. 6.Half of 142 =
  7. 7.Double 17 =
  8. 8.Half of 112 =
  9. 9.Double 85 =
  10. 10.Half of 62 =
  11. 11.Double 91 =
  12. 12.Double 59 =
  13. 13.Double 18 =
  14. 14.Half of 84 =
  15. 15.Half of 82 =
  16. 16.Double 32 =
  17. 17.Double 56 =
  18. 18.Half of 58 =
  19. 19.Half of 46 =
  20. 20.Double 76 =
  21. 21.Double 99 =
  22. 22.Half of 16 =
  23. 23.Half of 64 =
  24. 24.Half of 106 =
  25. 25.Double 11 =
  26. 26.Double 93 =
  27. 27.Double 25 =
  28. 28.Half of 132 =
  29. 29.Double 24 =
  30. 30.Half of 134 =
  31. 31.Half of 186 =
  32. 32.Double 45 =
  33. 33.Double 75 =
  34. 34.Double 53 =
  35. 35.Half of 102 =
  36. 36.Half of 118 =
  37. 37.Double 15 =
  38. 38.Half of 144 =
  39. 39.Double 79 =
  40. 40.Double 94 =

Answer key

  1. 54
  2. 62
  3. 13
  4. 52
  5. 196
  6. 71
  7. 34
  8. 56
  9. 170
  10. 31
  11. 182
  12. 118
  13. 36
  14. 42
  15. 41
  16. 64
  17. 112
  18. 29
  19. 23
  20. 152
  21. 198
  22. 8
  23. 32
  24. 53
  25. 22
  26. 186
  27. 50
  28. 66
  29. 48
  30. 67
  31. 93
  32. 90
  33. 150
  34. 106
  35. 51
  36. 59
  37. 30
  38. 72
  39. 158
  40. 188

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