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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 299 · 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 78 =
  2. 2.Double 51 =
  3. 3.Half of 14 =
  4. 4.Double 16 =
  5. 5.Double 17 =
  6. 6.Half of 192 =
  7. 7.Half of 174 =
  8. 8.Half of 32 =
  9. 9.Double 62 =
  10. 10.Double 45 =
  11. 11.Half of 68 =
  12. 12.Double 98 =
  13. 13.Double 12 =
  14. 14.Half of 52 =
  15. 15.Double 71 =
  16. 16.Half of 44 =
  17. 17.Double 89 =
  18. 18.Half of 34 =
  19. 19.Half of 42 =
  20. 20.Double 21 =
  21. 21.Half of 102 =
  22. 22.Half of 178 =
  23. 23.Double 74 =
  24. 24.Half of 118 =
  25. 25.Double 26 =
  26. 26.Double 97 =
  27. 27.Double 18 =
  28. 28.Double 63 =
  29. 29.Double 72 =
  30. 30.Half of 94 =
  31. 31.Double 33 =
  32. 32.Half of 172 =
  33. 33.Double 81 =
  34. 34.Half of 152 =
  35. 35.Double 31 =
  36. 36.Double 68 =
  37. 37.Half of 18 =
  38. 38.Half of 132 =
  39. 39.Double 19 =
  40. 40.Double 48 =

Answer key

  1. 156
  2. 102
  3. 7
  4. 32
  5. 34
  6. 96
  7. 87
  8. 16
  9. 124
  10. 90
  11. 34
  12. 196
  13. 24
  14. 26
  15. 142
  16. 22
  17. 178
  18. 17
  19. 21
  20. 42
  21. 51
  22. 89
  23. 148
  24. 59
  25. 52
  26. 194
  27. 36
  28. 126
  29. 144
  30. 47
  31. 66
  32. 86
  33. 162
  34. 76
  35. 62
  36. 136
  37. 9
  38. 66
  39. 38
  40. 96

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