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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 306 · 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 32 =
  3. 3.Double 31 =
  4. 4.Half of 92 =
  5. 5.Half of 132 =
  6. 6.Double 21 =
  7. 7.Double 12 =
  8. 8.Half of 196 =
  9. 9.Half of 62 =
  10. 10.Double 11 =
  11. 11.Half of 28 =
  12. 12.Double 86 =
  13. 13.Double 19 =
  14. 14.Double 98 =
  15. 15.Half of 52 =
  16. 16.Double 17 =
  17. 17.Half of 186 =
  18. 18.Half of 148 =
  19. 19.Half of 18 =
  20. 20.Half of 164 =
  21. 21.Half of 128 =
  22. 22.Double 32 =
  23. 23.Half of 76 =
  24. 24.Double 27 =
  25. 25.Half of 102 =
  26. 26.Double 55 =
  27. 27.Double 36 =
  28. 28.Half of 194 =
  29. 29.Half of 16 =
  30. 30.Half of 64 =
  31. 31.Half of 98 =
  32. 32.Half of 122 =
  33. 33.Half of 86 =
  34. 34.Double 94 =
  35. 35.Half of 126 =
  36. 36.Half of 96 =
  37. 37.Half of 142 =
  38. 38.Double 75 =
  39. 39.Half of 106 =
  40. 40.Half of 162 =

Answer key

  1. 102
  2. 16
  3. 62
  4. 46
  5. 66
  6. 42
  7. 24
  8. 98
  9. 31
  10. 22
  11. 14
  12. 172
  13. 38
  14. 196
  15. 26
  16. 34
  17. 93
  18. 74
  19. 9
  20. 82
  21. 64
  22. 64
  23. 38
  24. 54
  25. 51
  26. 110
  27. 72
  28. 97
  29. 8
  30. 32
  31. 49
  32. 61
  33. 43
  34. 188
  35. 63
  36. 48
  37. 71
  38. 150
  39. 53
  40. 81

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