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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 774 · 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 36 =
  3. 3.Double 94 =
  4. 4.Half of 188 =
  5. 5.Half of 96 =
  6. 6.Double 45 =
  7. 7.Double 83 =
  8. 8.Double 37 =
  9. 9.Double 31 =
  10. 10.Half of 134 =
  11. 11.Double 19 =
  12. 12.Half of 122 =
  13. 13.Half of 54 =
  14. 14.Half of 12 =
  15. 15.Half of 112 =
  16. 16.Double 69 =
  17. 17.Double 18 =
  18. 18.Double 33 =
  19. 19.Double 91 =
  20. 20.Half of 132 =
  21. 21.Double 75 =
  22. 22.Double 15 =
  23. 23.Double 21 =
  24. 24.Double 27 =
  25. 25.Double 87 =
  26. 26.Half of 88 =
  27. 27.Double 76 =
  28. 28.Half of 108 =
  29. 29.Half of 178 =
  30. 30.Double 57 =
  31. 31.Double 54 =
  32. 32.Double 59 =
  33. 33.Half of 162 =
  34. 34.Double 93 =
  35. 35.Double 79 =
  36. 36.Half of 86 =
  37. 37.Half of 64 =
  38. 38.Half of 42 =
  39. 39.Half of 198 =
  40. 40.Half of 16 =

Answer key

  1. 63
  2. 72
  3. 188
  4. 94
  5. 48
  6. 90
  7. 166
  8. 74
  9. 62
  10. 67
  11. 38
  12. 61
  13. 27
  14. 6
  15. 56
  16. 138
  17. 36
  18. 66
  19. 182
  20. 66
  21. 150
  22. 30
  23. 42
  24. 54
  25. 174
  26. 44
  27. 152
  28. 54
  29. 89
  30. 114
  31. 108
  32. 118
  33. 81
  34. 186
  35. 158
  36. 43
  37. 32
  38. 21
  39. 99
  40. 8

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