4×-3.2×=40.32 0.8× =40.32 ×=40.32÷0.8 ×=50.4
3.2X=4X-40.323.2X-4X=-40.32-0.8X=-40.320.8X=40.32X=50.4矮油 毕业这么多年居然还会算 不容易
50.4
100
