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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 868 · 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 52 =
  2. 2.Half of 102 =
  3. 3.Half of 98 =
  4. 4.Double 35 =
  5. 5.Double 91 =
  6. 6.Double 43 =
  7. 7.Double 72 =
  8. 8.Double 23 =
  9. 9.Half of 138 =
  10. 10.Double 84 =
  11. 11.Double 31 =
  12. 12.Half of 18 =
  13. 13.Double 21 =
  14. 14.Half of 152 =
  15. 15.Half of 32 =
  16. 16.Double 51 =
  17. 17.Half of 174 =
  18. 18.Half of 122 =
  19. 19.Double 96 =
  20. 20.Half of 56 =
  21. 21.Double 79 =
  22. 22.Double 64 =
  23. 23.Double 95 =
  24. 24.Half of 78 =
  25. 25.Half of 176 =
  26. 26.Half of 126 =
  27. 27.Double 78 =
  28. 28.Double 26 =
  29. 29.Half of 96 =
  30. 30.Half of 92 =
  31. 31.Double 28 =
  32. 32.Double 93 =
  33. 33.Double 17 =
  34. 34.Half of 186 =
  35. 35.Half of 198 =
  36. 36.Double 13 =
  37. 37.Half of 72 =
  38. 38.Double 75 =
  39. 39.Double 42 =
  40. 40.Double 11 =

Answer key

  1. 26
  2. 51
  3. 49
  4. 70
  5. 182
  6. 86
  7. 144
  8. 46
  9. 69
  10. 168
  11. 62
  12. 9
  13. 42
  14. 76
  15. 16
  16. 102
  17. 87
  18. 61
  19. 192
  20. 28
  21. 158
  22. 128
  23. 190
  24. 39
  25. 88
  26. 63
  27. 156
  28. 52
  29. 48
  30. 46
  31. 56
  32. 186
  33. 34
  34. 93
  35. 99
  36. 26
  37. 36
  38. 150
  39. 84
  40. 22

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