用简便的方法计算,X1m5E3G3r
2.88÷（0.43+1.07）,X1m5E3G3r
算式：提示'@;H9W2E4Q.l4c6s/i4H6{,X1m5E3G3r
=7n,H9_;J4H.B(f0h3\,~+I8`2l5p,X1m5E3G3r