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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 45 · 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 72 =
  2. 2.Double 26 =
  3. 3.Double 59 =
  4. 4.Double 83 =
  5. 5.Double 76 =
  6. 6.Half of 142 =
  7. 7.Double 53 =
  8. 8.Double 38 =
  9. 9.Double 22 =
  10. 10.Half of 186 =
  11. 11.Half of 128 =
  12. 12.Half of 156 =
  13. 13.Double 21 =
  14. 14.Double 34 =
  15. 15.Half of 48 =
  16. 16.Half of 122 =
  17. 17.Half of 102 =
  18. 18.Half of 114 =
  19. 19.Half of 94 =
  20. 20.Double 39 =
  21. 21.Double 57 =
  22. 22.Half of 132 =
  23. 23.Half of 84 =
  24. 24.Half of 98 =
  25. 25.Double 85 =
  26. 26.Double 99 =
  27. 27.Half of 16 =
  28. 28.Double 91 =
  29. 29.Half of 32 =
  30. 30.Double 47 =
  31. 31.Half of 52 =
  32. 32.Half of 182 =
  33. 33.Double 14 =
  34. 34.Double 74 =
  35. 35.Half of 136 =
  36. 36.Double 77 =
  37. 37.Half of 92 =
  38. 38.Half of 172 =
  39. 39.Double 63 =
  40. 40.Half of 58 =

Answer key

  1. 144
  2. 52
  3. 118
  4. 166
  5. 152
  6. 71
  7. 106
  8. 76
  9. 44
  10. 93
  11. 64
  12. 78
  13. 42
  14. 68
  15. 24
  16. 61
  17. 51
  18. 57
  19. 47
  20. 78
  21. 114
  22. 66
  23. 42
  24. 49
  25. 170
  26. 198
  27. 8
  28. 182
  29. 16
  30. 94
  31. 26
  32. 91
  33. 28
  34. 148
  35. 68
  36. 154
  37. 46
  38. 86
  39. 126
  40. 29

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