上式=7.48×26+25.2×(0.1×26)=7.48×26+(25.2×0.1)×26=(7.48+2.52)×26=10×26=260
=7.48×26+2.52×26=（7.48+2.52）×26=10×26=260 很简单的一道题
原式=7.48×26+2.52×26=（7.48+2.52）×26=10×26=260
7.48×26+25.2×2.6=(7.48+2.52)×26=10×26=260
