(+1又1/4)-(+5)+(-1/3)+(-5又2/3)簡便計算.

(+1又1/4)-(+5)+(-1/3)+(-5又2/3)簡便計算.

(+1又1/4)-(+5)+(-1/3)+(-5又2/3)
=[(+1又1/4)-(+5)]+[(-1/3)+(-5又2/3)]
=-3又3/4+(-6)
=-9又3/4