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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 335 · 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 136 =
  2. 2.Half of 24 =
  3. 3.Double 22 =
  4. 4.Half of 148 =
  5. 5.Double 71 =
  6. 6.Double 55 =
  7. 7.Double 67 =
  8. 8.Double 64 =
  9. 9.Double 73 =
  10. 10.Half of 48 =
  11. 11.Half of 66 =
  12. 12.Half of 16 =
  13. 13.Half of 62 =
  14. 14.Double 16 =
  15. 15.Double 86 =
  16. 16.Double 69 =
  17. 17.Half of 172 =
  18. 18.Double 32 =
  19. 19.Double 19 =
  20. 20.Half of 152 =
  21. 21.Half of 124 =
  22. 22.Double 51 =
  23. 23.Double 56 =
  24. 24.Half of 36 =
  25. 25.Half of 164 =
  26. 26.Double 83 =
  27. 27.Half of 44 =
  28. 28.Double 87 =
  29. 29.Double 25 =
  30. 30.Half of 96 =
  31. 31.Half of 104 =
  32. 32.Double 18 =
  33. 33.Half of 22 =
  34. 34.Double 75 =
  35. 35.Half of 116 =
  36. 36.Double 81 =
  37. 37.Double 35 =
  38. 38.Double 94 =
  39. 39.Double 21 =
  40. 40.Double 34 =

Answer key

  1. 68
  2. 12
  3. 44
  4. 74
  5. 142
  6. 110
  7. 134
  8. 128
  9. 146
  10. 24
  11. 33
  12. 8
  13. 31
  14. 32
  15. 172
  16. 138
  17. 86
  18. 64
  19. 38
  20. 76
  21. 62
  22. 102
  23. 112
  24. 18
  25. 82
  26. 166
  27. 22
  28. 174
  29. 50
  30. 48
  31. 52
  32. 36
  33. 11
  34. 150
  35. 58
  36. 162
  37. 70
  38. 188
  39. 42
  40. 68

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