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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 712 · 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 88 =
  2. 2.Half of 56 =
  3. 3.Double 41 =
  4. 4.Half of 62 =
  5. 5.Double 42 =
  6. 6.Half of 178 =
  7. 7.Double 92 =
  8. 8.Double 32 =
  9. 9.Half of 98 =
  10. 10.Double 79 =
  11. 11.Double 21 =
  12. 12.Double 35 =
  13. 13.Half of 198 =
  14. 14.Double 26 =
  15. 15.Half of 146 =
  16. 16.Double 53 =
  17. 17.Double 43 =
  18. 18.Double 24 =
  19. 19.Double 49 =
  20. 20.Double 48 =
  21. 21.Half of 174 =
  22. 22.Half of 158 =
  23. 23.Half of 102 =
  24. 24.Double 83 =
  25. 25.Half of 34 =
  26. 26.Double 71 =
  27. 27.Double 51 =
  28. 28.Double 87 =
  29. 29.Half of 182 =
  30. 30.Double 76 =
  31. 31.Half of 52 =
  32. 32.Half of 122 =
  33. 33.Double 18 =
  34. 34.Double 17 =
  35. 35.Half of 148 =
  36. 36.Double 58 =
  37. 37.Half of 44 =
  38. 38.Half of 194 =
  39. 39.Half of 64 =
  40. 40.Double 25 =

Answer key

  1. 44
  2. 28
  3. 82
  4. 31
  5. 84
  6. 89
  7. 184
  8. 64
  9. 49
  10. 158
  11. 42
  12. 70
  13. 99
  14. 52
  15. 73
  16. 106
  17. 86
  18. 48
  19. 98
  20. 96
  21. 87
  22. 79
  23. 51
  24. 166
  25. 17
  26. 142
  27. 102
  28. 174
  29. 91
  30. 152
  31. 26
  32. 61
  33. 36
  34. 34
  35. 74
  36. 116
  37. 22
  38. 97
  39. 32
  40. 50

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