12.6-1.9 1.9-3.39简便方法怎么算?
问题描述:
12.6-1.9 1.9-3.39简便方法怎么算?
答
10+2.6-1.9
1.5+0.4-0.39-3
12.6-1.9 1.9-3.39简便方法怎么算?
10+2.6-1.9
1.5+0.4-0.39-3