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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 170 · 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 17 =
  2. 2.Half of 196 =
  3. 3.Half of 126 =
  4. 4.Half of 32 =
  5. 5.Double 58 =
  6. 6.Double 78 =
  7. 7.Double 41 =
  8. 8.Half of 116 =
  9. 9.Double 42 =
  10. 10.Double 15 =
  11. 11.Double 91 =
  12. 12.Half of 142 =
  13. 13.Half of 146 =
  14. 14.Double 39 =
  15. 15.Double 64 =
  16. 16.Double 21 =
  17. 17.Half of 34 =
  18. 18.Half of 44 =
  19. 19.Half of 122 =
  20. 20.Double 27 =
  21. 21.Half of 46 =
  22. 22.Half of 22 =
  23. 23.Half of 16 =
  24. 24.Double 62 =
  25. 25.Half of 104 =
  26. 26.Half of 176 =
  27. 27.Double 24 =
  28. 28.Double 74 =
  29. 29.Double 16 =
  30. 30.Half of 198 =
  31. 31.Half of 164 =
  32. 32.Double 71 =
  33. 33.Half of 54 =
  34. 34.Half of 112 =
  35. 35.Double 51 =
  36. 36.Half of 64 =
  37. 37.Double 57 =
  38. 38.Double 52 =
  39. 39.Double 65 =
  40. 40.Double 19 =

Answer key

  1. 34
  2. 98
  3. 63
  4. 16
  5. 116
  6. 156
  7. 82
  8. 58
  9. 84
  10. 30
  11. 182
  12. 71
  13. 73
  14. 78
  15. 128
  16. 42
  17. 17
  18. 22
  19. 61
  20. 54
  21. 23
  22. 11
  23. 8
  24. 124
  25. 52
  26. 88
  27. 48
  28. 148
  29. 32
  30. 99
  31. 82
  32. 142
  33. 27
  34. 56
  35. 102
  36. 32
  37. 114
  38. 104
  39. 130
  40. 38

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