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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 669 · 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 51 =
  2. 2.Half of 198 =
  3. 3.Double 58 =
  4. 4.Double 75 =
  5. 5.Half of 94 =
  6. 6.Half of 16 =
  7. 7.Half of 72 =
  8. 8.Double 24 =
  9. 9.Half of 42 =
  10. 10.Double 66 =
  11. 11.Half of 132 =
  12. 12.Double 16 =
  13. 13.Half of 156 =
  14. 14.Half of 12 =
  15. 15.Double 81 =
  16. 16.Double 31 =
  17. 17.Double 49 =
  18. 18.Double 22 =
  19. 19.Double 56 =
  20. 20.Half of 122 =
  21. 21.Half of 98 =
  22. 22.Double 36 =
  23. 23.Double 27 =
  24. 24.Half of 196 =
  25. 25.Double 85 =
  26. 26.Half of 164 =
  27. 27.Double 33 =
  28. 28.Double 67 =
  29. 29.Double 88 =
  30. 30.Half of 68 =
  31. 31.Half of 128 =
  32. 32.Double 72 =
  33. 33.Double 96 =
  34. 34.Half of 44 =
  35. 35.Half of 172 =
  36. 36.Half of 116 =
  37. 37.Double 54 =
  38. 38.Half of 38 =
  39. 39.Half of 108 =
  40. 40.Double 37 =

Answer key

  1. 102
  2. 99
  3. 116
  4. 150
  5. 47
  6. 8
  7. 36
  8. 48
  9. 21
  10. 132
  11. 66
  12. 32
  13. 78
  14. 6
  15. 162
  16. 62
  17. 98
  18. 44
  19. 112
  20. 61
  21. 49
  22. 72
  23. 54
  24. 98
  25. 170
  26. 82
  27. 66
  28. 134
  29. 176
  30. 34
  31. 64
  32. 144
  33. 192
  34. 22
  35. 86
  36. 58
  37. 108
  38. 19
  39. 54
  40. 74

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