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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 917 · 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 51 =
  2. 2.Half of 166 =
  3. 3.Half of 192 =
  4. 4.Half of 134 =
  5. 5.Double 78 =
  6. 6.Double 64 =
  7. 7.Half of 108 =
  8. 8.Half of 66 =
  9. 9.Double 72 =
  10. 10.Double 16 =
  11. 11.Half of 48 =
  12. 12.Half of 68 =
  13. 13.Half of 52 =
  14. 14.Half of 198 =
  15. 15.Half of 12 =
  16. 16.Double 77 =
  17. 17.Half of 18 =
  18. 18.Double 19 =
  19. 19.Half of 152 =
  20. 20.Double 42 =
  21. 21.Half of 32 =
  22. 22.Double 27 =
  23. 23.Half of 132 =
  24. 24.Double 57 =
  25. 25.Double 52 =
  26. 26.Half of 16 =
  27. 27.Double 11 =
  28. 28.Double 43 =
  29. 29.Half of 94 =
  30. 30.Double 79 =
  31. 31.Half of 98 =
  32. 32.Half of 124 =
  33. 33.Half of 62 =
  34. 34.Half of 106 =
  35. 35.Double 86 =
  36. 36.Double 67 =
  37. 37.Half of 172 =
  38. 38.Double 97 =
  39. 39.Double 63 =
  40. 40.Double 94 =

Answer key

  1. 102
  2. 83
  3. 96
  4. 67
  5. 156
  6. 128
  7. 54
  8. 33
  9. 144
  10. 32
  11. 24
  12. 34
  13. 26
  14. 99
  15. 6
  16. 154
  17. 9
  18. 38
  19. 76
  20. 84
  21. 16
  22. 54
  23. 66
  24. 114
  25. 104
  26. 8
  27. 22
  28. 86
  29. 47
  30. 158
  31. 49
  32. 62
  33. 31
  34. 53
  35. 172
  36. 134
  37. 86
  38. 194
  39. 126
  40. 188

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