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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 377 · 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 21 =
  2. 2.Double 68 =
  3. 3.Half of 88 =
  4. 4.Half of 102 =
  5. 5.Double 65 =
  6. 6.Double 14 =
  7. 7.Double 32 =
  8. 8.Double 22 =
  9. 9.Half of 198 =
  10. 10.Half of 96 =
  11. 11.Double 96 =
  12. 12.Half of 22 =
  13. 13.Double 86 =
  14. 14.Double 52 =
  15. 15.Half of 128 =
  16. 16.Double 61 =
  17. 17.Half of 122 =
  18. 18.Double 78 =
  19. 19.Double 88 =
  20. 20.Double 35 =
  21. 21.Double 59 =
  22. 22.Half of 132 =
  23. 23.Half of 174 =
  24. 24.Double 67 =
  25. 25.Double 27 =
  26. 26.Half of 148 =
  27. 27.Double 75 =
  28. 28.Double 99 =
  29. 29.Half of 76 =
  30. 30.Half of 74 =
  31. 31.Half of 46 =
  32. 32.Half of 58 =
  33. 33.Half of 36 =
  34. 34.Double 12 =
  35. 35.Half of 196 =
  36. 36.Half of 14 =
  37. 37.Half of 38 =
  38. 38.Double 74 =
  39. 39.Half of 188 =
  40. 40.Double 44 =

Answer key

  1. 42
  2. 136
  3. 44
  4. 51
  5. 130
  6. 28
  7. 64
  8. 44
  9. 99
  10. 48
  11. 192
  12. 11
  13. 172
  14. 104
  15. 64
  16. 122
  17. 61
  18. 156
  19. 176
  20. 70
  21. 118
  22. 66
  23. 87
  24. 134
  25. 54
  26. 74
  27. 150
  28. 198
  29. 38
  30. 37
  31. 23
  32. 29
  33. 18
  34. 24
  35. 98
  36. 7
  37. 19
  38. 148
  39. 94
  40. 88

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