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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 701 · 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 68 =
  2. 2.Double 79 =
  3. 3.Half of 148 =
  4. 4.Half of 164 =
  5. 5.Half of 194 =
  6. 6.Double 19 =
  7. 7.Double 92 =
  8. 8.Half of 132 =
  9. 9.Half of 172 =
  10. 10.Half of 44 =
  11. 11.Double 52 =
  12. 12.Double 81 =
  13. 13.Double 41 =
  14. 14.Half of 186 =
  15. 15.Double 84 =
  16. 16.Double 24 =
  17. 17.Half of 84 =
  18. 18.Half of 126 =
  19. 19.Half of 176 =
  20. 20.Half of 76 =
  21. 21.Double 37 =
  22. 22.Half of 124 =
  23. 23.Double 74 =
  24. 24.Double 12 =
  25. 25.Half of 72 =
  26. 26.Double 95 =
  27. 27.Double 25 =
  28. 28.Double 78 =
  29. 29.Double 62 =
  30. 30.Double 13 =
  31. 31.Double 69 =
  32. 32.Half of 86 =
  33. 33.Double 18 =
  34. 34.Double 21 =
  35. 35.Double 11 =
  36. 36.Half of 42 =
  37. 37.Double 35 =
  38. 38.Double 48 =
  39. 39.Half of 36 =
  40. 40.Half of 146 =

Answer key

  1. 136
  2. 158
  3. 74
  4. 82
  5. 97
  6. 38
  7. 184
  8. 66
  9. 86
  10. 22
  11. 104
  12. 162
  13. 82
  14. 93
  15. 168
  16. 48
  17. 42
  18. 63
  19. 88
  20. 38
  21. 74
  22. 62
  23. 148
  24. 24
  25. 36
  26. 190
  27. 50
  28. 156
  29. 124
  30. 26
  31. 138
  32. 43
  33. 36
  34. 42
  35. 22
  36. 21
  37. 70
  38. 96
  39. 18
  40. 73

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