用简便运算做250×﹙57×4﹚
问题描述：
用简便运算做250×﹙57×4﹚
答
250×﹙57×4﹚
=250×4×57
=1000×57
=57000
用简便运算做250×﹙57×4﹚
250×﹙57×4﹚
=250×4×57
=1000×57
=57000