计算题:(2.3456+3.4567)*(1+3.4567)-(1+2.3456+3.4567)*3.

问题描述:

计算题:(2.3456+3.4567)*(1+3.4567)-(1+2.3456+3.4567)*3.

(2.3456+3.4567)*(1+3.4567)-(1+2.3456+3.4567)*3.4567
=(2.3456+3.4567)*(1+3.4567)-1*3.4567-(2.3456+3.4567)*3.4567
=2.3456+3.4567-3.4567
=2.3456