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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 358 · 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 96 =
  2. 2.Half of 72 =
  3. 3.Double 67 =
  4. 4.Half of 182 =
  5. 5.Half of 22 =
  6. 6.Double 78 =
  7. 7.Half of 172 =
  8. 8.Half of 162 =
  9. 9.Half of 132 =
  10. 10.Double 32 =
  11. 11.Double 12 =
  12. 12.Double 66 =
  13. 13.Double 87 =
  14. 14.Half of 164 =
  15. 15.Double 45 =
  16. 16.Half of 92 =
  17. 17.Half of 18 =
  18. 18.Double 13 =
  19. 19.Double 24 =
  20. 20.Half of 154 =
  21. 21.Double 88 =
  22. 22.Half of 136 =
  23. 23.Double 85 =
  24. 24.Double 56 =
  25. 25.Half of 36 =
  26. 26.Double 83 =
  27. 27.Half of 146 =
  28. 28.Double 75 =
  29. 29.Half of 156 =
  30. 30.Double 62 =
  31. 31.Double 57 =
  32. 32.Double 64 =
  33. 33.Double 35 =
  34. 34.Half of 66 =
  35. 35.Double 39 =
  36. 36.Half of 112 =
  37. 37.Double 18 =
  38. 38.Double 77 =
  39. 39.Half of 122 =
  40. 40.Double 36 =

Answer key

  1. 192
  2. 36
  3. 134
  4. 91
  5. 11
  6. 156
  7. 86
  8. 81
  9. 66
  10. 64
  11. 24
  12. 132
  13. 174
  14. 82
  15. 90
  16. 46
  17. 9
  18. 26
  19. 48
  20. 77
  21. 176
  22. 68
  23. 170
  24. 112
  25. 18
  26. 166
  27. 73
  28. 150
  29. 78
  30. 124
  31. 114
  32. 128
  33. 70
  34. 33
  35. 78
  36. 56
  37. 36
  38. 154
  39. 61
  40. 72

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