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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 808 · 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 46 =
  2. 2.Half of 72 =
  3. 3.Double 21 =
  4. 4.Double 88 =
  5. 5.Double 15 =
  6. 6.Double 93 =
  7. 7.Half of 196 =
  8. 8.Double 96 =
  9. 9.Half of 102 =
  10. 10.Double 24 =
  11. 11.Half of 22 =
  12. 12.Half of 136 =
  13. 13.Half of 56 =
  14. 14.Double 23 =
  15. 15.Half of 64 =
  16. 16.Half of 174 =
  17. 17.Half of 62 =
  18. 18.Double 43 =
  19. 19.Double 68 =
  20. 20.Half of 128 =
  21. 21.Half of 158 =
  22. 22.Half of 44 =
  23. 23.Half of 188 =
  24. 24.Double 36 =
  25. 25.Half of 152 =
  26. 26.Half of 134 =
  27. 27.Double 34 =
  28. 28.Double 55 =
  29. 29.Double 31 =
  30. 30.Double 17 =
  31. 31.Double 67 =
  32. 32.Double 86 =
  33. 33.Double 56 =
  34. 34.Half of 186 =
  35. 35.Half of 36 =
  36. 36.Double 37 =
  37. 37.Double 18 =
  38. 38.Half of 52 =
  39. 39.Half of 142 =
  40. 40.Half of 92 =

Answer key

  1. 92
  2. 36
  3. 42
  4. 176
  5. 30
  6. 186
  7. 98
  8. 192
  9. 51
  10. 48
  11. 11
  12. 68
  13. 28
  14. 46
  15. 32
  16. 87
  17. 31
  18. 86
  19. 136
  20. 64
  21. 79
  22. 22
  23. 94
  24. 72
  25. 76
  26. 67
  27. 68
  28. 110
  29. 62
  30. 34
  31. 134
  32. 172
  33. 112
  34. 93
  35. 18
  36. 74
  37. 36
  38. 26
  39. 71
  40. 46

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