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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 842 · 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 31 =
  2. 2.Double 55 =
  3. 3.Double 35 =
  4. 4.Half of 174 =
  5. 5.Double 14 =
  6. 6.Double 48 =
  7. 7.Half of 64 =
  8. 8.Double 56 =
  9. 9.Double 92 =
  10. 10.Half of 178 =
  11. 11.Half of 126 =
  12. 12.Half of 72 =
  13. 13.Half of 62 =
  14. 14.Half of 192 =
  15. 15.Half of 148 =
  16. 16.Double 27 =
  17. 17.Half of 78 =
  18. 18.Half of 112 =
  19. 19.Double 34 =
  20. 20.Double 25 =
  21. 21.Double 54 =
  22. 22.Double 78 =
  23. 23.Half of 32 =
  24. 24.Half of 136 =
  25. 25.Double 53 =
  26. 26.Half of 172 =
  27. 27.Half of 46 =
  28. 28.Half of 14 =
  29. 29.Double 91 =
  30. 30.Half of 134 =
  31. 31.Double 43 =
  32. 32.Double 44 =
  33. 33.Half of 88 =
  34. 34.Half of 98 =
  35. 35.Double 57 =
  36. 36.Half of 188 =
  37. 37.Half of 186 =
  38. 38.Double 38 =
  39. 39.Double 46 =
  40. 40.Double 85 =

Answer key

  1. 62
  2. 110
  3. 70
  4. 87
  5. 28
  6. 96
  7. 32
  8. 112
  9. 184
  10. 89
  11. 63
  12. 36
  13. 31
  14. 96
  15. 74
  16. 54
  17. 39
  18. 56
  19. 68
  20. 50
  21. 108
  22. 156
  23. 16
  24. 68
  25. 106
  26. 86
  27. 23
  28. 7
  29. 182
  30. 67
  31. 86
  32. 88
  33. 44
  34. 49
  35. 114
  36. 94
  37. 93
  38. 76
  39. 92
  40. 170

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