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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 143 · 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 85 =
  2. 2.Half of 178 =
  3. 3.Double 75 =
  4. 4.Double 52 =
  5. 5.Half of 22 =
  6. 6.Double 18 =
  7. 7.Double 22 =
  8. 8.Double 63 =
  9. 9.Half of 172 =
  10. 10.Double 33 =
  11. 11.Double 13 =
  12. 12.Double 83 =
  13. 13.Double 71 =
  14. 14.Double 81 =
  15. 15.Half of 184 =
  16. 16.Double 89 =
  17. 17.Double 64 =
  18. 18.Double 11 =
  19. 19.Double 31 =
  20. 20.Half of 54 =
  21. 21.Double 73 =
  22. 22.Double 37 =
  23. 23.Half of 126 =
  24. 24.Half of 196 =
  25. 25.Double 51 =
  26. 26.Half of 128 =
  27. 27.Double 15 =
  28. 28.Double 98 =
  29. 29.Half of 88 =
  30. 30.Double 56 =
  31. 31.Double 86 =
  32. 32.Half of 92 =
  33. 33.Double 29 =
  34. 34.Half of 62 =
  35. 35.Double 26 =
  36. 36.Half of 28 =
  37. 37.Double 44 =
  38. 38.Half of 114 =
  39. 39.Double 36 =
  40. 40.Half of 32 =

Answer key

  1. 170
  2. 89
  3. 150
  4. 104
  5. 11
  6. 36
  7. 44
  8. 126
  9. 86
  10. 66
  11. 26
  12. 166
  13. 142
  14. 162
  15. 92
  16. 178
  17. 128
  18. 22
  19. 62
  20. 27
  21. 146
  22. 74
  23. 63
  24. 98
  25. 102
  26. 64
  27. 30
  28. 196
  29. 44
  30. 112
  31. 172
  32. 46
  33. 58
  34. 31
  35. 52
  36. 14
  37. 88
  38. 57
  39. 72
  40. 16

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