(2.3456+3.4567)*(1+3.4567)-(1+2.3456+3.4567)*3.4567怎么做

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(2.3456+3.4567)*(1+3.4567)-(1+2.3456+3.4567)*3.4567怎么做

(2.3456+3.4567)*(1+3.4567)-(1+2.3456+3.4567)*3.4567怎么做
(2.3456+3.4567)*(1+3.4567)-(1+2.3456+3.4567)*3.4567怎么做

(2.3456+3.4567)*(1+3.4567)-(1+2.3456+3.4567)*3.4567怎么做
原式=2.3456*1+3.4567*1+3.4567*3.4567-3.4567*1-3.4567*2.3456
-3.4567*3.4567=2.3456-3.4567=-1.1111