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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 921 · 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 42 =
  2. 2.Double 79 =
  3. 3.Double 91 =
  4. 4.Half of 114 =
  5. 5.Half of 106 =
  6. 6.Double 58 =
  7. 7.Double 86 =
  8. 8.Double 43 =
  9. 9.Half of 192 =
  10. 10.Double 76 =
  11. 11.Double 97 =
  12. 12.Half of 152 =
  13. 13.Half of 194 =
  14. 14.Half of 112 =
  15. 15.Double 98 =
  16. 16.Half of 78 =
  17. 17.Double 42 =
  18. 18.Half of 32 =
  19. 19.Half of 136 =
  20. 20.Double 25 =
  21. 21.Half of 66 =
  22. 22.Half of 22 =
  23. 23.Double 66 =
  24. 24.Double 62 =
  25. 25.Half of 88 =
  26. 26.Half of 26 =
  27. 27.Half of 64 =
  28. 28.Half of 62 =
  29. 29.Half of 52 =
  30. 30.Half of 82 =
  31. 31.Half of 94 =
  32. 32.Half of 172 =
  33. 33.Double 65 =
  34. 34.Double 35 =
  35. 35.Double 78 =
  36. 36.Half of 148 =
  37. 37.Double 55 =
  38. 38.Double 22 =
  39. 39.Half of 158 =
  40. 40.Half of 84 =

Answer key

  1. 21
  2. 158
  3. 182
  4. 57
  5. 53
  6. 116
  7. 172
  8. 86
  9. 96
  10. 152
  11. 194
  12. 76
  13. 97
  14. 56
  15. 196
  16. 39
  17. 84
  18. 16
  19. 68
  20. 50
  21. 33
  22. 11
  23. 132
  24. 124
  25. 44
  26. 13
  27. 32
  28. 31
  29. 26
  30. 41
  31. 47
  32. 86
  33. 130
  34. 70
  35. 156
  36. 74
  37. 110
  38. 44
  39. 79
  40. 42

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