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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 901 · 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 24 =
  2. 2.Double 93 =
  3. 3.Half of 92 =
  4. 4.Double 85 =
  5. 5.Half of 188 =
  6. 6.Half of 38 =
  7. 7.Half of 106 =
  8. 8.Half of 52 =
  9. 9.Double 73 =
  10. 10.Half of 162 =
  11. 11.Half of 146 =
  12. 12.Double 33 =
  13. 13.Half of 94 =
  14. 14.Double 79 =
  15. 15.Double 66 =
  16. 16.Half of 122 =
  17. 17.Half of 96 =
  18. 18.Half of 74 =
  19. 19.Double 87 =
  20. 20.Double 59 =
  21. 21.Half of 22 =
  22. 22.Double 37 =
  23. 23.Half of 68 =
  24. 24.Double 77 =
  25. 25.Double 64 =
  26. 26.Half of 108 =
  27. 27.Double 54 =
  28. 28.Double 43 =
  29. 29.Half of 32 =
  30. 30.Double 13 =
  31. 31.Half of 42 =
  32. 32.Half of 62 =
  33. 33.Double 74 =
  34. 34.Double 99 =
  35. 35.Half of 138 =
  36. 36.Double 31 =
  37. 37.Double 21 =
  38. 38.Half of 112 =
  39. 39.Half of 46 =
  40. 40.Double 14 =

Answer key

  1. 48
  2. 186
  3. 46
  4. 170
  5. 94
  6. 19
  7. 53
  8. 26
  9. 146
  10. 81
  11. 73
  12. 66
  13. 47
  14. 158
  15. 132
  16. 61
  17. 48
  18. 37
  19. 174
  20. 118
  21. 11
  22. 74
  23. 34
  24. 154
  25. 128
  26. 54
  27. 108
  28. 86
  29. 16
  30. 26
  31. 21
  32. 31
  33. 148
  34. 198
  35. 69
  36. 62
  37. 42
  38. 56
  39. 23
  40. 28

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