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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 923 · 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.Half of 102 =
  2. 2.Double 36 =
  3. 3.Half of 194 =
  4. 4.Half of 88 =
  5. 5.Double 74 =
  6. 6.Double 57 =
  7. 7.Double 37 =
  8. 8.Double 76 =
  9. 9.Double 17 =
  10. 10.Half of 28 =
  11. 11.Double 25 =
  12. 12.Double 35 =
  13. 13.Double 27 =
  14. 14.Double 81 =
  15. 15.Half of 154 =
  16. 16.Half of 26 =
  17. 17.Half of 132 =
  18. 18.Double 63 =
  19. 19.Half of 92 =
  20. 20.Double 43 =
  21. 21.Half of 58 =
  22. 22.Double 45 =
  23. 23.Double 33 =
  24. 24.Double 59 =
  25. 25.Double 18 =
  26. 26.Half of 186 =
  27. 27.Half of 14 =
  28. 28.Half of 22 =
  29. 29.Double 32 =
  30. 30.Double 98 =
  31. 31.Double 54 =
  32. 32.Double 72 =
  33. 33.Half of 16 =
  34. 34.Half of 72 =
  35. 35.Double 12 =
  36. 36.Half of 184 =
  37. 37.Double 85 =
  38. 38.Double 42 =
  39. 39.Double 84 =
  40. 40.Double 71 =

Answer key

  1. 51
  2. 72
  3. 97
  4. 44
  5. 148
  6. 114
  7. 74
  8. 152
  9. 34
  10. 14
  11. 50
  12. 70
  13. 54
  14. 162
  15. 77
  16. 13
  17. 66
  18. 126
  19. 46
  20. 86
  21. 29
  22. 90
  23. 66
  24. 118
  25. 36
  26. 93
  27. 7
  28. 11
  29. 64
  30. 196
  31. 108
  32. 144
  33. 8
  34. 36
  35. 24
  36. 92
  37. 170
  38. 84
  39. 168
  40. 142

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