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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 803 · 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 33 =
  2. 2.Double 59 =
  3. 3.Double 46 =
  4. 4.Half of 52 =
  5. 5.Half of 16 =
  6. 6.Double 88 =
  7. 7.Half of 22 =
  8. 8.Half of 192 =
  9. 9.Half of 114 =
  10. 10.Double 14 =
  11. 11.Half of 58 =
  12. 12.Double 31 =
  13. 13.Half of 174 =
  14. 14.Half of 126 =
  15. 15.Half of 134 =
  16. 16.Double 51 =
  17. 17.Double 16 =
  18. 18.Double 54 =
  19. 19.Half of 46 =
  20. 20.Double 22 =
  21. 21.Double 24 =
  22. 22.Double 27 =
  23. 23.Half of 112 =
  24. 24.Half of 124 =
  25. 25.Double 17 =
  26. 26.Double 26 =
  27. 27.Half of 92 =
  28. 28.Double 55 =
  29. 29.Double 94 =
  30. 30.Double 84 =
  31. 31.Half of 66 =
  32. 32.Half of 68 =
  33. 33.Double 83 =
  34. 34.Half of 162 =
  35. 35.Half of 184 =
  36. 36.Half of 196 =
  37. 37.Half of 122 =
  38. 38.Double 74 =
  39. 39.Double 11 =
  40. 40.Double 39 =

Answer key

  1. 66
  2. 118
  3. 92
  4. 26
  5. 8
  6. 176
  7. 11
  8. 96
  9. 57
  10. 28
  11. 29
  12. 62
  13. 87
  14. 63
  15. 67
  16. 102
  17. 32
  18. 108
  19. 23
  20. 44
  21. 48
  22. 54
  23. 56
  24. 62
  25. 34
  26. 52
  27. 46
  28. 110
  29. 188
  30. 168
  31. 33
  32. 34
  33. 166
  34. 81
  35. 92
  36. 98
  37. 61
  38. 148
  39. 22
  40. 78

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