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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 947 · 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 52 =
  2. 2.Double 32 =
  3. 3.Double 89 =
  4. 4.Double 45 =
  5. 5.Half of 32 =
  6. 6.Double 88 =
  7. 7.Double 36 =
  8. 8.Double 63 =
  9. 9.Double 34 =
  10. 10.Half of 156 =
  11. 11.Double 91 =
  12. 12.Double 11 =
  13. 13.Half of 184 =
  14. 14.Double 54 =
  15. 15.Double 27 =
  16. 16.Half of 192 =
  17. 17.Double 38 =
  18. 18.Half of 146 =
  19. 19.Half of 132 =
  20. 20.Half of 186 =
  21. 21.Double 41 =
  22. 22.Double 24 =
  23. 23.Double 74 =
  24. 24.Double 15 =
  25. 25.Half of 166 =
  26. 26.Double 46 =
  27. 27.Half of 38 =
  28. 28.Double 33 =
  29. 29.Half of 106 =
  30. 30.Double 49 =
  31. 31.Half of 144 =
  32. 32.Half of 46 =
  33. 33.Double 47 =
  34. 34.Half of 134 =
  35. 35.Half of 44 =
  36. 36.Double 21 =
  37. 37.Half of 74 =
  38. 38.Double 61 =
  39. 39.Half of 112 =
  40. 40.Double 57 =

Answer key

  1. 26
  2. 64
  3. 178
  4. 90
  5. 16
  6. 176
  7. 72
  8. 126
  9. 68
  10. 78
  11. 182
  12. 22
  13. 92
  14. 108
  15. 54
  16. 96
  17. 76
  18. 73
  19. 66
  20. 93
  21. 82
  22. 48
  23. 148
  24. 30
  25. 83
  26. 92
  27. 19
  28. 66
  29. 53
  30. 98
  31. 72
  32. 23
  33. 94
  34. 67
  35. 22
  36. 42
  37. 37
  38. 122
  39. 56
  40. 114

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