(100)1per2 - (216)2per3 + (256)3per4

[tex]100 \frac{1}{2} - 216\frac{2}{3} + 256 \frac{3}{4} \\ \\ =(100-216+256)+(\frac{1}{2}-\frac{2}{3}+\frac{3}{4}) \\ \\ =140+(\frac{6-8+9}{12}) \\ \\ =140\frac{7}{12}[/tex]

kalo menurut saya seperti ini
100-1728+20736=19558