Question

(—370)*(—1/4)+0.25*24.5+5.5*(—0.25)简便方法 注意：是5.5不是—5.5

Answer 1

(—370)*(—1/4)+0.25*24.5+5.5*(—0.25)

=0.25(370+24.5-5.5)

=0.25*389

=97.25