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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 797 · 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.Half of 112 =
  2. 2.Half of 142 =
  3. 3.Double 61 =
  4. 4.Double 39 =
  5. 5.Double 96 =
  6. 6.Double 87 =
  7. 7.Half of 102 =
  8. 8.Double 29 =
  9. 9.Half of 174 =
  10. 10.Half of 158 =
  11. 11.Half of 22 =
  12. 12.Double 21 =
  13. 13.Double 63 =
  14. 14.Double 71 =
  15. 15.Double 35 =
  16. 16.Half of 56 =
  17. 17.Half of 166 =
  18. 18.Half of 92 =
  19. 19.Half of 108 =
  20. 20.Double 72 =
  21. 21.Double 94 =
  22. 22.Double 97 =
  23. 23.Double 68 =
  24. 24.Double 88 =
  25. 25.Half of 12 =
  26. 26.Half of 124 =
  27. 27.Double 44 =
  28. 28.Half of 96 =
  29. 29.Double 19 =
  30. 30.Half of 178 =
  31. 31.Double 38 =
  32. 32.Double 46 =
  33. 33.Double 16 =
  34. 34.Half of 48 =
  35. 35.Double 23 =
  36. 36.Half of 18 =
  37. 37.Half of 146 =
  38. 38.Half of 24 =
  39. 39.Double 11 =
  40. 40.Double 74 =

Answer key

  1. 56
  2. 71
  3. 122
  4. 78
  5. 192
  6. 174
  7. 51
  8. 58
  9. 87
  10. 79
  11. 11
  12. 42
  13. 126
  14. 142
  15. 70
  16. 28
  17. 83
  18. 46
  19. 54
  20. 144
  21. 188
  22. 194
  23. 136
  24. 176
  25. 6
  26. 62
  27. 88
  28. 48
  29. 38
  30. 89
  31. 76
  32. 92
  33. 32
  34. 24
  35. 46
  36. 9
  37. 73
  38. 12
  39. 22
  40. 148

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