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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 961 · 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 54 =
  2. 2.Double 74 =
  3. 3.Double 89 =
  4. 4.Double 82 =
  5. 5.Half of 142 =
  6. 6.Double 26 =
  7. 7.Half of 186 =
  8. 8.Half of 78 =
  9. 9.Double 62 =
  10. 10.Half of 12 =
  11. 11.Double 95 =
  12. 12.Double 71 =
  13. 13.Double 59 =
  14. 14.Double 73 =
  15. 15.Double 88 =
  16. 16.Half of 164 =
  17. 17.Half of 108 =
  18. 18.Double 36 =
  19. 19.Half of 32 =
  20. 20.Half of 58 =
  21. 21.Double 35 =
  22. 22.Double 14 =
  23. 23.Half of 66 =
  24. 24.Double 51 =
  25. 25.Double 68 =
  26. 26.Double 12 =
  27. 27.Double 43 =
  28. 28.Double 45 =
  29. 29.Double 86 =
  30. 30.Double 53 =
  31. 31.Half of 22 =
  32. 32.Double 98 =
  33. 33.Double 84 =
  34. 34.Half of 178 =
  35. 35.Double 76 =
  36. 36.Double 48 =
  37. 37.Double 18 =
  38. 38.Double 57 =
  39. 39.Double 41 =
  40. 40.Double 25 =

Answer key

  1. 108
  2. 148
  3. 178
  4. 164
  5. 71
  6. 52
  7. 93
  8. 39
  9. 124
  10. 6
  11. 190
  12. 142
  13. 118
  14. 146
  15. 176
  16. 82
  17. 54
  18. 72
  19. 16
  20. 29
  21. 70
  22. 28
  23. 33
  24. 102
  25. 136
  26. 24
  27. 86
  28. 90
  29. 172
  30. 106
  31. 11
  32. 196
  33. 168
  34. 89
  35. 152
  36. 96
  37. 36
  38. 114
  39. 82
  40. 50

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