一根竹竿长5.7米,插入泥中2.8米,露出水面1.4米.水深多少米?
26×49+26.
用简便方法计算:24.6×4.6+246×0.44+24.6.
①25.74﹣2.36﹣7.64 ②0.75×0.25×4 ③8.4÷0.25÷4④2.8×3.6+1.4×2.8.
96×101.
48×201.