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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 509 · 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 46 =
  2. 2.Double 85 =
  3. 3.Double 56 =
  4. 4.Double 63 =
  5. 5.Half of 162 =
  6. 6.Double 16 =
  7. 7.Double 14 =
  8. 8.Half of 84 =
  9. 9.Half of 32 =
  10. 10.Double 91 =
  11. 11.Half of 22 =
  12. 12.Half of 34 =
  13. 13.Half of 52 =
  14. 14.Double 17 =
  15. 15.Half of 194 =
  16. 16.Half of 72 =
  17. 17.Half of 56 =
  18. 18.Double 96 =
  19. 19.Double 13 =
  20. 20.Half of 122 =
  21. 21.Double 84 =
  22. 22.Half of 102 =
  23. 23.Half of 92 =
  24. 24.Double 88 =
  25. 25.Half of 58 =
  26. 26.Double 55 =
  27. 27.Double 78 =
  28. 28.Double 87 =
  29. 29.Double 11 =
  30. 30.Double 21 =
  31. 31.Double 43 =
  32. 32.Half of 196 =
  33. 33.Half of 158 =
  34. 34.Half of 152 =
  35. 35.Half of 136 =
  36. 36.Half of 108 =
  37. 37.Half of 44 =
  38. 38.Double 99 =
  39. 39.Double 64 =
  40. 40.Double 81 =

Answer key

  1. 92
  2. 170
  3. 112
  4. 126
  5. 81
  6. 32
  7. 28
  8. 42
  9. 16
  10. 182
  11. 11
  12. 17
  13. 26
  14. 34
  15. 97
  16. 36
  17. 28
  18. 192
  19. 26
  20. 61
  21. 168
  22. 51
  23. 46
  24. 176
  25. 29
  26. 110
  27. 156
  28. 174
  29. 22
  30. 42
  31. 86
  32. 98
  33. 79
  34. 76
  35. 68
  36. 54
  37. 22
  38. 198
  39. 128
  40. 162

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