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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 623 · 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 45 =
  2. 2.Double 34 =
  3. 3.Double 28 =
  4. 4.Half of 134 =
  5. 5.Half of 92 =
  6. 6.Half of 26 =
  7. 7.Half of 68 =
  8. 8.Double 18 =
  9. 9.Half of 148 =
  10. 10.Half of 182 =
  11. 11.Double 75 =
  12. 12.Double 76 =
  13. 13.Double 94 =
  14. 14.Double 97 =
  15. 15.Double 62 =
  16. 16.Double 24 =
  17. 17.Double 98 =
  18. 18.Double 79 =
  19. 19.Double 85 =
  20. 20.Half of 54 =
  21. 21.Half of 114 =
  22. 22.Half of 106 =
  23. 23.Half of 76 =
  24. 24.Half of 178 =
  25. 25.Half of 52 =
  26. 26.Half of 156 =
  27. 27.Half of 146 =
  28. 28.Double 86 =
  29. 29.Half of 144 =
  30. 30.Double 81 =
  31. 31.Double 17 =
  32. 32.Half of 108 =
  33. 33.Half of 32 =
  34. 34.Double 74 =
  35. 35.Double 29 =
  36. 36.Half of 158 =
  37. 37.Half of 174 =
  38. 38.Double 92 =
  39. 39.Double 64 =
  40. 40.Double 47 =

Answer key

  1. 90
  2. 68
  3. 56
  4. 67
  5. 46
  6. 13
  7. 34
  8. 36
  9. 74
  10. 91
  11. 150
  12. 152
  13. 188
  14. 194
  15. 124
  16. 48
  17. 196
  18. 158
  19. 170
  20. 27
  21. 57
  22. 53
  23. 38
  24. 89
  25. 26
  26. 78
  27. 73
  28. 172
  29. 72
  30. 162
  31. 34
  32. 54
  33. 16
  34. 148
  35. 58
  36. 79
  37. 87
  38. 184
  39. 128
  40. 94

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