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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 869 · 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 136 =
  2. 2.Half of 52 =
  3. 3.Double 76 =
  4. 4.Double 13 =
  5. 5.Double 43 =
  6. 6.Half of 36 =
  7. 7.Double 49 =
  8. 8.Half of 138 =
  9. 9.Double 19 =
  10. 10.Double 21 =
  11. 11.Half of 86 =
  12. 12.Double 47 =
  13. 13.Half of 142 =
  14. 14.Half of 32 =
  15. 15.Half of 64 =
  16. 16.Double 94 =
  17. 17.Double 58 =
  18. 18.Double 31 =
  19. 19.Double 99 =
  20. 20.Double 79 =
  21. 21.Half of 62 =
  22. 22.Half of 152 =
  23. 23.Double 78 =
  24. 24.Double 22 =
  25. 25.Double 36 =
  26. 26.Double 25 =
  27. 27.Half of 164 =
  28. 28.Double 16 =
  29. 29.Half of 182 =
  30. 30.Half of 192 =
  31. 31.Half of 102 =
  32. 32.Double 27 =
  33. 33.Half of 42 =
  34. 34.Double 48 =
  35. 35.Double 17 =
  36. 36.Double 92 =
  37. 37.Half of 166 =
  38. 38.Double 29 =
  39. 39.Double 89 =
  40. 40.Double 82 =

Answer key

  1. 68
  2. 26
  3. 152
  4. 26
  5. 86
  6. 18
  7. 98
  8. 69
  9. 38
  10. 42
  11. 43
  12. 94
  13. 71
  14. 16
  15. 32
  16. 188
  17. 116
  18. 62
  19. 198
  20. 158
  21. 31
  22. 76
  23. 156
  24. 44
  25. 72
  26. 50
  27. 82
  28. 32
  29. 91
  30. 96
  31. 51
  32. 54
  33. 21
  34. 96
  35. 34
  36. 184
  37. 83
  38. 58
  39. 178
  40. 164

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