8.5÷0.5+1.5×2=8.5×2+1.5×2=2×(8.5+1.5)=2×10=204.78×4+5.22÷0.25+5.22+0.25=4.78×4+5.22×4+5.22+0.25=4×(4.78+5.22)+5.22+0.25=40+5.22+0.25=45.475.23÷0.25+4.77×4=5.23×4+4.77×4=4×(4.77+5.23)=4...
明天交卷啦,额,不要做错的哦,我的悬赏是10,可以加.
8.5÷0.5+1.5×2=8.5×2+1.5×2=2×(8.5+1.5)=2×10=204.78×4+5.22÷0.25+5.22+0.25=4.78×4+5.22×4+5.22+0.25=4×(4.78+5.22)+5.22+0.25=40+5.22+0.25=45.475.23÷0.25+4.77×4=5.23×4+4.77×4=4×(4.77+5.23)=4...