列竖式计算.(带▲的要验算)▲856﹣557= ▲376+198= 36÷9=52÷8= 304×8= 247×6=
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)×25 125×27×834×23+77×34 41.2﹣1.47﹣9.53 37×99.
865﹣498.