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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 975 · 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 88 =
  2. 2.Double 38 =
  3. 3.Half of 52 =
  4. 4.Double 72 =
  5. 5.Half of 174 =
  6. 6.Double 45 =
  7. 7.Half of 124 =
  8. 8.Double 17 =
  9. 9.Double 31 =
  10. 10.Double 18 =
  11. 11.Half of 148 =
  12. 12.Double 91 =
  13. 13.Double 44 =
  14. 14.Double 61 =
  15. 15.Double 75 =
  16. 16.Double 84 =
  17. 17.Half of 14 =
  18. 18.Half of 112 =
  19. 19.Double 21 =
  20. 20.Half of 104 =
  21. 21.Double 67 =
  22. 22.Double 85 =
  23. 23.Half of 152 =
  24. 24.Half of 154 =
  25. 25.Half of 64 =
  26. 26.Half of 118 =
  27. 27.Double 41 =
  28. 28.Half of 48 =
  29. 29.Double 51 =
  30. 30.Double 95 =
  31. 31.Double 93 =
  32. 32.Double 97 =
  33. 33.Double 94 =
  34. 34.Double 52 =
  35. 35.Double 81 =
  36. 36.Double 56 =
  37. 37.Half of 172 =
  38. 38.Double 14 =
  39. 39.Double 32 =
  40. 40.Half of 26 =

Answer key

  1. 176
  2. 76
  3. 26
  4. 144
  5. 87
  6. 90
  7. 62
  8. 34
  9. 62
  10. 36
  11. 74
  12. 182
  13. 88
  14. 122
  15. 150
  16. 168
  17. 7
  18. 56
  19. 42
  20. 52
  21. 134
  22. 170
  23. 76
  24. 77
  25. 32
  26. 59
  27. 82
  28. 24
  29. 102
  30. 190
  31. 186
  32. 194
  33. 188
  34. 104
  35. 162
  36. 112
  37. 86
  38. 28
  39. 64
  40. 13

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