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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 511 · 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 11 =
  2. 2.Double 75 =
  3. 3.Double 59 =
  4. 4.Half of 142 =
  5. 5.Half of 98 =
  6. 6.Double 91 =
  7. 7.Half of 56 =
  8. 8.Half of 148 =
  9. 9.Double 86 =
  10. 10.Half of 156 =
  11. 11.Double 67 =
  12. 12.Half of 86 =
  13. 13.Half of 154 =
  14. 14.Double 31 =
  15. 15.Double 32 =
  16. 16.Half of 22 =
  17. 17.Half of 158 =
  18. 18.Half of 178 =
  19. 19.Double 99 =
  20. 20.Double 51 =
  21. 21.Half of 186 =
  22. 22.Double 25 =
  23. 23.Double 47 =
  24. 24.Double 64 =
  25. 25.Half of 152 =
  26. 26.Double 57 =
  27. 27.Double 23 =
  28. 28.Double 18 =
  29. 29.Double 15 =
  30. 30.Half of 28 =
  31. 31.Double 38 =
  32. 32.Double 69 =
  33. 33.Double 95 =
  34. 34.Double 48 =
  35. 35.Double 63 =
  36. 36.Double 21 =
  37. 37.Half of 118 =
  38. 38.Half of 144 =
  39. 39.Double 12 =
  40. 40.Double 44 =

Answer key

  1. 22
  2. 150
  3. 118
  4. 71
  5. 49
  6. 182
  7. 28
  8. 74
  9. 172
  10. 78
  11. 134
  12. 43
  13. 77
  14. 62
  15. 64
  16. 11
  17. 79
  18. 89
  19. 198
  20. 102
  21. 93
  22. 50
  23. 94
  24. 128
  25. 76
  26. 114
  27. 46
  28. 36
  29. 30
  30. 14
  31. 76
  32. 138
  33. 190
  34. 96
  35. 126
  36. 42
  37. 59
  38. 72
  39. 24
  40. 88

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