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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 780 · 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 64 =
  2. 2.Half of 108 =
  3. 3.Double 39 =
  4. 4.Double 12 =
  5. 5.Double 69 =
  6. 6.Half of 84 =
  7. 7.Half of 102 =
  8. 8.Double 19 =
  9. 9.Double 21 =
  10. 10.Half of 182 =
  11. 11.Double 89 =
  12. 12.Double 76 =
  13. 13.Half of 38 =
  14. 14.Half of 56 =
  15. 15.Half of 48 =
  16. 16.Half of 162 =
  17. 17.Double 96 =
  18. 18.Half of 152 =
  19. 19.Double 88 =
  20. 20.Half of 46 =
  21. 21.Double 77 =
  22. 22.Double 56 =
  23. 23.Half of 34 =
  24. 24.Double 67 =
  25. 25.Half of 88 =
  26. 26.Double 34 =
  27. 27.Half of 62 =
  28. 28.Double 98 =
  29. 29.Half of 122 =
  30. 30.Half of 42 =
  31. 31.Double 55 =
  32. 32.Double 24 =
  33. 33.Double 45 =
  34. 34.Half of 126 =
  35. 35.Half of 146 =
  36. 36.Half of 124 =
  37. 37.Double 13 =
  38. 38.Double 29 =
  39. 39.Double 91 =
  40. 40.Double 26 =

Answer key

  1. 32
  2. 54
  3. 78
  4. 24
  5. 138
  6. 42
  7. 51
  8. 38
  9. 42
  10. 91
  11. 178
  12. 152
  13. 19
  14. 28
  15. 24
  16. 81
  17. 192
  18. 76
  19. 176
  20. 23
  21. 154
  22. 112
  23. 17
  24. 134
  25. 44
  26. 68
  27. 31
  28. 196
  29. 61
  30. 21
  31. 110
  32. 48
  33. 90
  34. 63
  35. 73
  36. 62
  37. 26
  38. 58
  39. 182
  40. 52

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