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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 934 · 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 12 =
  2. 2.Double 75 =
  3. 3.Double 47 =
  4. 4.Half of 128 =
  5. 5.Double 46 =
  6. 6.Double 15 =
  7. 7.Double 98 =
  8. 8.Half of 88 =
  9. 9.Half of 132 =
  10. 10.Double 58 =
  11. 11.Half of 142 =
  12. 12.Double 21 =
  13. 13.Half of 122 =
  14. 14.Double 13 =
  15. 15.Double 63 =
  16. 16.Half of 66 =
  17. 17.Double 14 =
  18. 18.Half of 54 =
  19. 19.Half of 138 =
  20. 20.Double 39 =
  21. 21.Double 53 =
  22. 22.Double 33 =
  23. 23.Half of 174 =
  24. 24.Double 28 =
  25. 25.Double 95 =
  26. 26.Double 19 =
  27. 27.Half of 188 =
  28. 28.Half of 172 =
  29. 29.Half of 92 =
  30. 30.Double 64 =
  31. 31.Half of 32 =
  32. 32.Double 31 =
  33. 33.Double 92 =
  34. 34.Double 76 =
  35. 35.Double 25 =
  36. 36.Double 79 =
  37. 37.Double 61 =
  38. 38.Half of 152 =
  39. 39.Half of 18 =
  40. 40.Half of 72 =

Answer key

  1. 6
  2. 150
  3. 94
  4. 64
  5. 92
  6. 30
  7. 196
  8. 44
  9. 66
  10. 116
  11. 71
  12. 42
  13. 61
  14. 26
  15. 126
  16. 33
  17. 28
  18. 27
  19. 69
  20. 78
  21. 106
  22. 66
  23. 87
  24. 56
  25. 190
  26. 38
  27. 94
  28. 86
  29. 46
  30. 128
  31. 16
  32. 62
  33. 184
  34. 152
  35. 50
  36. 158
  37. 122
  38. 76
  39. 9
  40. 36

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