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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 79 · 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 97 =
  2. 2.Double 39 =
  3. 3.Half of 42 =
  4. 4.Half of 176 =
  5. 5.Double 18 =
  6. 6.Double 16 =
  7. 7.Half of 52 =
  8. 8.Double 82 =
  9. 9.Double 72 =
  10. 10.Double 94 =
  11. 11.Double 96 =
  12. 12.Half of 72 =
  13. 13.Half of 86 =
  14. 14.Double 63 =
  15. 15.Half of 12 =
  16. 16.Double 23 =
  17. 17.Double 22 =
  18. 18.Half of 156 =
  19. 19.Half of 112 =
  20. 20.Half of 94 =
  21. 21.Half of 196 =
  22. 22.Half of 184 =
  23. 23.Double 57 =
  24. 24.Half of 18 =
  25. 25.Double 51 =
  26. 26.Double 52 =
  27. 27.Half of 96 =
  28. 28.Half of 58 =
  29. 29.Half of 38 =
  30. 30.Double 85 =
  31. 31.Half of 128 =
  32. 32.Double 26 =
  33. 33.Half of 162 =
  34. 34.Half of 24 =
  35. 35.Half of 22 =
  36. 36.Double 21 =
  37. 37.Double 66 =
  38. 38.Half of 102 =
  39. 39.Half of 14 =
  40. 40.Half of 88 =

Answer key

  1. 194
  2. 78
  3. 21
  4. 88
  5. 36
  6. 32
  7. 26
  8. 164
  9. 144
  10. 188
  11. 192
  12. 36
  13. 43
  14. 126
  15. 6
  16. 46
  17. 44
  18. 78
  19. 56
  20. 47
  21. 98
  22. 92
  23. 114
  24. 9
  25. 102
  26. 104
  27. 48
  28. 29
  29. 19
  30. 170
  31. 64
  32. 52
  33. 81
  34. 12
  35. 11
  36. 42
  37. 132
  38. 51
  39. 7
  40. 44

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