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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 910 · 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 26 =
  2. 2.Half of 166 =
  3. 3.Half of 56 =
  4. 4.Double 47 =
  5. 5.Double 19 =
  6. 6.Half of 14 =
  7. 7.Half of 38 =
  8. 8.Double 64 =
  9. 9.Double 18 =
  10. 10.Double 14 =
  11. 11.Double 28 =
  12. 12.Double 53 =
  13. 13.Double 32 =
  14. 14.Double 56 =
  15. 15.Double 96 =
  16. 16.Double 87 =
  17. 17.Double 93 =
  18. 18.Double 66 =
  19. 19.Double 98 =
  20. 20.Half of 132 =
  21. 21.Half of 82 =
  22. 22.Double 12 =
  23. 23.Double 49 =
  24. 24.Double 73 =
  25. 25.Double 71 =
  26. 26.Double 41 =
  27. 27.Double 23 =
  28. 28.Half of 172 =
  29. 29.Double 21 =
  30. 30.Half of 108 =
  31. 31.Half of 92 =
  32. 32.Half of 78 =
  33. 33.Half of 72 =
  34. 34.Double 36 =
  35. 35.Double 68 =
  36. 36.Half of 86 =
  37. 37.Double 37 =
  38. 38.Double 63 =
  39. 39.Double 86 =
  40. 40.Double 57 =

Answer key

  1. 13
  2. 83
  3. 28
  4. 94
  5. 38
  6. 7
  7. 19
  8. 128
  9. 36
  10. 28
  11. 56
  12. 106
  13. 64
  14. 112
  15. 192
  16. 174
  17. 186
  18. 132
  19. 196
  20. 66
  21. 41
  22. 24
  23. 98
  24. 146
  25. 142
  26. 82
  27. 46
  28. 86
  29. 42
  30. 54
  31. 46
  32. 39
  33. 36
  34. 72
  35. 136
  36. 43
  37. 74
  38. 126
  39. 172
  40. 114

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