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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 751 · 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 85 =
  2. 2.Double 22 =
  3. 3.Double 67 =
  4. 4.Double 55 =
  5. 5.Half of 18 =
  6. 6.Half of 162 =
  7. 7.Double 79 =
  8. 8.Half of 168 =
  9. 9.Half of 52 =
  10. 10.Half of 134 =
  11. 11.Double 81 =
  12. 12.Half of 164 =
  13. 13.Half of 176 =
  14. 14.Double 43 =
  15. 15.Half of 76 =
  16. 16.Double 38 =
  17. 17.Double 47 =
  18. 18.Half of 132 =
  19. 19.Half of 138 =
  20. 20.Double 34 =
  21. 21.Double 84 =
  22. 22.Double 62 =
  23. 23.Double 68 =
  24. 24.Double 98 =
  25. 25.Half of 32 =
  26. 26.Double 97 =
  27. 27.Double 15 =
  28. 28.Double 74 =
  29. 29.Half of 122 =
  30. 30.Half of 38 =
  31. 31.Half of 148 =
  32. 32.Half of 72 =
  33. 33.Double 59 =
  34. 34.Half of 198 =
  35. 35.Half of 142 =
  36. 36.Half of 22 =
  37. 37.Half of 46 =
  38. 38.Double 44 =
  39. 39.Double 21 =
  40. 40.Double 56 =

Answer key

  1. 170
  2. 44
  3. 134
  4. 110
  5. 9
  6. 81
  7. 158
  8. 84
  9. 26
  10. 67
  11. 162
  12. 82
  13. 88
  14. 86
  15. 38
  16. 76
  17. 94
  18. 66
  19. 69
  20. 68
  21. 168
  22. 124
  23. 136
  24. 196
  25. 16
  26. 194
  27. 30
  28. 148
  29. 61
  30. 19
  31. 74
  32. 36
  33. 118
  34. 99
  35. 71
  36. 11
  37. 23
  38. 88
  39. 42
  40. 112

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