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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 615 · 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.Half of 16 =
  2. 2.Double 51 =
  3. 3.Half of 122 =
  4. 4.Double 34 =
  5. 5.Half of 44 =
  6. 6.Half of 136 =
  7. 7.Double 59 =
  8. 8.Double 91 =
  9. 9.Half of 164 =
  10. 10.Double 76 =
  11. 11.Double 94 =
  12. 12.Double 72 =
  13. 13.Double 35 =
  14. 14.Double 68 =
  15. 15.Half of 18 =
  16. 16.Half of 192 =
  17. 17.Half of 26 =
  18. 18.Half of 24 =
  19. 19.Double 21 =
  20. 20.Double 81 =
  21. 21.Double 99 =
  22. 22.Double 97 =
  23. 23.Double 25 =
  24. 24.Half of 198 =
  25. 25.Half of 112 =
  26. 26.Half of 176 =
  27. 27.Double 19 =
  28. 28.Double 75 =
  29. 29.Double 62 =
  30. 30.Half of 102 =
  31. 31.Double 98 =
  32. 32.Half of 28 =
  33. 33.Half of 94 =
  34. 34.Half of 48 =
  35. 35.Half of 52 =
  36. 36.Double 44 =
  37. 37.Half of 58 =
  38. 38.Double 58 =
  39. 39.Double 32 =
  40. 40.Half of 14 =

Answer key

  1. 8
  2. 102
  3. 61
  4. 68
  5. 22
  6. 68
  7. 118
  8. 182
  9. 82
  10. 152
  11. 188
  12. 144
  13. 70
  14. 136
  15. 9
  16. 96
  17. 13
  18. 12
  19. 42
  20. 162
  21. 198
  22. 194
  23. 50
  24. 99
  25. 56
  26. 88
  27. 38
  28. 150
  29. 124
  30. 51
  31. 196
  32. 14
  33. 47
  34. 24
  35. 26
  36. 88
  37. 29
  38. 116
  39. 64
  40. 7

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