7.2×2.83-0.72×27.3用简便激雀方法计算怎么明肆早做？雹敬
7.2×2.83-0.72×27.3
=7.2×2.83-7.2×2.73
=7.2×（2.83-2.73）
=7.2×0.1
=0.72
简便方法睁兆
7.2×2.83-0.72×27.3
=7.2x2.83-7.2x2.73
=7.2x（悉备租2.83-2.73）滚并
=7.2x0.1
=0.72
7.2×2.83-0.72×27.3
＝0.72×28.3-0.72×27.3
＝（28.3-27.3）×0.72
＝塌耐巧亩虚1×0.72
＝团键0.72
=7.2x（2.83-2.73）=7.2x0.1=0.72
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