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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 647 · 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 65 =
  2. 2.Double 67 =
  3. 3.Half of 162 =
  4. 4.Half of 76 =
  5. 5.Double 18 =
  6. 6.Half of 32 =
  7. 7.Half of 56 =
  8. 8.Double 37 =
  9. 9.Half of 94 =
  10. 10.Double 92 =
  11. 11.Double 71 =
  12. 12.Half of 196 =
  13. 13.Double 56 =
  14. 14.Double 22 =
  15. 15.Half of 118 =
  16. 16.Double 41 =
  17. 17.Double 78 =
  18. 18.Half of 22 =
  19. 19.Half of 192 =
  20. 20.Double 51 =
  21. 21.Half of 62 =
  22. 22.Half of 174 =
  23. 23.Double 24 =
  24. 24.Double 57 =
  25. 25.Half of 92 =
  26. 26.Double 11 =
  27. 27.Half of 136 =
  28. 28.Half of 72 =
  29. 29.Half of 146 =
  30. 30.Half of 152 =
  31. 31.Double 54 =
  32. 32.Half of 114 =
  33. 33.Double 53 =
  34. 34.Double 69 =
  35. 35.Half of 184 =
  36. 36.Double 59 =
  37. 37.Half of 58 =
  38. 38.Half of 106 =
  39. 39.Half of 112 =
  40. 40.Half of 42 =

Answer key

  1. 130
  2. 134
  3. 81
  4. 38
  5. 36
  6. 16
  7. 28
  8. 74
  9. 47
  10. 184
  11. 142
  12. 98
  13. 112
  14. 44
  15. 59
  16. 82
  17. 156
  18. 11
  19. 96
  20. 102
  21. 31
  22. 87
  23. 48
  24. 114
  25. 46
  26. 22
  27. 68
  28. 36
  29. 73
  30. 76
  31. 108
  32. 57
  33. 106
  34. 138
  35. 92
  36. 118
  37. 29
  38. 53
  39. 56
  40. 21

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