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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 760 · 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 49 =
  2. 2.Double 14 =
  3. 3.Half of 38 =
  4. 4.Half of 128 =
  5. 5.Double 58 =
  6. 6.Double 86 =
  7. 7.Half of 36 =
  8. 8.Double 97 =
  9. 9.Half of 56 =
  10. 10.Half of 44 =
  11. 11.Double 61 =
  12. 12.Half of 54 =
  13. 13.Double 11 =
  14. 14.Double 79 =
  15. 15.Half of 182 =
  16. 16.Double 99 =
  17. 17.Half of 32 =
  18. 18.Double 31 =
  19. 19.Half of 96 =
  20. 20.Half of 194 =
  21. 21.Double 46 =
  22. 22.Half of 154 =
  23. 23.Double 88 =
  24. 24.Double 29 =
  25. 25.Double 63 =
  26. 26.Half of 48 =
  27. 27.Double 66 =
  28. 28.Double 51 =
  29. 29.Half of 132 =
  30. 30.Double 78 =
  31. 31.Double 83 =
  32. 32.Double 62 =
  33. 33.Double 95 =
  34. 34.Half of 68 =
  35. 35.Double 92 =
  36. 36.Half of 192 =
  37. 37.Double 91 =
  38. 38.Double 98 =
  39. 39.Double 56 =
  40. 40.Half of 112 =

Answer key

  1. 98
  2. 28
  3. 19
  4. 64
  5. 116
  6. 172
  7. 18
  8. 194
  9. 28
  10. 22
  11. 122
  12. 27
  13. 22
  14. 158
  15. 91
  16. 198
  17. 16
  18. 62
  19. 48
  20. 97
  21. 92
  22. 77
  23. 176
  24. 58
  25. 126
  26. 24
  27. 132
  28. 102
  29. 66
  30. 156
  31. 166
  32. 124
  33. 190
  34. 34
  35. 184
  36. 96
  37. 182
  38. 196
  39. 112
  40. 56

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