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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 732 · 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 78 =
  2. 2.Half of 18 =
  3. 3.Half of 172 =
  4. 4.Half of 174 =
  5. 5.Double 76 =
  6. 6.Half of 182 =
  7. 7.Double 25 =
  8. 8.Double 13 =
  9. 9.Half of 122 =
  10. 10.Double 27 =
  11. 11.Double 53 =
  12. 12.Double 49 =
  13. 13.Double 64 =
  14. 14.Double 12 =
  15. 15.Half of 16 =
  16. 16.Double 71 =
  17. 17.Double 95 =
  18. 18.Half of 32 =
  19. 19.Half of 38 =
  20. 20.Double 43 =
  21. 21.Double 11 =
  22. 22.Double 63 =
  23. 23.Half of 192 =
  24. 24.Half of 132 =
  25. 25.Double 92 =
  26. 26.Half of 22 =
  27. 27.Half of 52 =
  28. 28.Half of 48 =
  29. 29.Double 21 =
  30. 30.Double 56 =
  31. 31.Double 89 =
  32. 32.Double 99 =
  33. 33.Double 17 =
  34. 34.Half of 24 =
  35. 35.Half of 68 =
  36. 36.Half of 102 =
  37. 37.Half of 56 =
  38. 38.Half of 42 =
  39. 39.Double 77 =
  40. 40.Half of 146 =

Answer key

  1. 156
  2. 9
  3. 86
  4. 87
  5. 152
  6. 91
  7. 50
  8. 26
  9. 61
  10. 54
  11. 106
  12. 98
  13. 128
  14. 24
  15. 8
  16. 142
  17. 190
  18. 16
  19. 19
  20. 86
  21. 22
  22. 126
  23. 96
  24. 66
  25. 184
  26. 11
  27. 26
  28. 24
  29. 42
  30. 112
  31. 178
  32. 198
  33. 34
  34. 12
  35. 34
  36. 51
  37. 28
  38. 21
  39. 154
  40. 73

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