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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 528 · 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 58 =
  2. 2.Double 18 =
  3. 3.Double 61 =
  4. 4.Double 16 =
  5. 5.Double 74 =
  6. 6.Double 44 =
  7. 7.Half of 52 =
  8. 8.Half of 174 =
  9. 9.Double 37 =
  10. 10.Double 11 =
  11. 11.Double 64 =
  12. 12.Half of 134 =
  13. 13.Double 77 =
  14. 14.Half of 108 =
  15. 15.Double 31 =
  16. 16.Double 24 =
  17. 17.Double 27 =
  18. 18.Double 86 =
  19. 19.Double 45 =
  20. 20.Half of 142 =
  21. 21.Half of 158 =
  22. 22.Double 63 =
  23. 23.Double 17 =
  24. 24.Double 87 =
  25. 25.Double 13 =
  26. 26.Double 15 =
  27. 27.Half of 22 =
  28. 28.Double 73 =
  29. 29.Half of 184 =
  30. 30.Half of 92 =
  31. 31.Half of 58 =
  32. 32.Double 96 =
  33. 33.Double 53 =
  34. 34.Double 83 =
  35. 35.Double 97 =
  36. 36.Half of 106 =
  37. 37.Half of 12 =
  38. 38.Double 26 =
  39. 39.Double 78 =
  40. 40.Half of 144 =

Answer key

  1. 116
  2. 36
  3. 122
  4. 32
  5. 148
  6. 88
  7. 26
  8. 87
  9. 74
  10. 22
  11. 128
  12. 67
  13. 154
  14. 54
  15. 62
  16. 48
  17. 54
  18. 172
  19. 90
  20. 71
  21. 79
  22. 126
  23. 34
  24. 174
  25. 26
  26. 30
  27. 11
  28. 146
  29. 92
  30. 46
  31. 29
  32. 192
  33. 106
  34. 166
  35. 194
  36. 53
  37. 6
  38. 52
  39. 156
  40. 72

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