【题目】计算下面各题.
345+8×9804﹣(347+198)(437﹣381)÷7
【答案】417;259;8
【解析】
345+8×9
=345+72
=417
804﹣(347+198)
=804﹣545
=259
(437﹣381)÷7
=56÷7
=8