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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 851 · 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 23 =
  2. 2.Half of 94 =
  3. 3.Double 11 =
  4. 4.Half of 116 =
  5. 5.Double 21 =
  6. 6.Double 71 =
  7. 7.Half of 108 =
  8. 8.Double 34 =
  9. 9.Half of 152 =
  10. 10.Half of 176 =
  11. 11.Half of 32 =
  12. 12.Half of 92 =
  13. 13.Double 24 =
  14. 14.Half of 86 =
  15. 15.Double 63 =
  16. 16.Double 36 =
  17. 17.Half of 84 =
  18. 18.Double 39 =
  19. 19.Half of 56 =
  20. 20.Double 43 =
  21. 21.Half of 54 =
  22. 22.Double 17 =
  23. 23.Double 73 =
  24. 24.Half of 28 =
  25. 25.Double 86 =
  26. 26.Double 74 =
  27. 27.Double 85 =
  28. 28.Half of 82 =
  29. 29.Half of 62 =
  30. 30.Double 25 =
  31. 31.Half of 72 =
  32. 32.Double 49 =
  33. 33.Half of 188 =
  34. 34.Double 26 =
  35. 35.Double 87 =
  36. 36.Double 96 =
  37. 37.Double 89 =
  38. 38.Half of 162 =
  39. 39.Half of 186 =
  40. 40.Half of 104 =

Answer key

  1. 46
  2. 47
  3. 22
  4. 58
  5. 42
  6. 142
  7. 54
  8. 68
  9. 76
  10. 88
  11. 16
  12. 46
  13. 48
  14. 43
  15. 126
  16. 72
  17. 42
  18. 78
  19. 28
  20. 86
  21. 27
  22. 34
  23. 146
  24. 14
  25. 172
  26. 148
  27. 170
  28. 41
  29. 31
  30. 50
  31. 36
  32. 98
  33. 94
  34. 52
  35. 174
  36. 192
  37. 178
  38. 81
  39. 93
  40. 52

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