用竖式计算.213×32= 125×23= 215×25= 43×25=300×25= 480×30= 209×60= 305×18=
用简便方法计算..
8100÷25÷4.
简便运算 ①6.2×10.1 ②1.25×32×0.25 ③35.4×44.2﹣35.3×44.3.
101×38.
用简便方法算下面各题. 4.8+25.36+17.2+14.64 (400﹣2)×25125×27×8 34×23+77×3441.2﹣1.47﹣9.53 37×99.