来自姬光荣的问题
脱式计算.(能简算的要简算)7.69×2.1+2.1×1.31+2.118-(1.4+1.25×2.4)7.2÷1.6+0.8解方程:4×4.5-3X=6.33.
脱式计算.(能简算的要简算)
7.69×2.1+2.1×1.31+2.1
18-(1.4+1.25×2.4)
7.2÷1.6+0.8
解方程:4×4.5-3X=6.33.
1回答
2020-05-24 17:02