297+29.7×44.5+29.7×45.5怎么简算 过程一定要完整!
问题描述：
297+29.7×44.5+29.7×45.5怎么简算 过程一定要完整!
答
原式=297+29.7*（44.5+45.5）=297+29.7*90=297*（1+9）=2970
答
=29.7×10+29.7×44.5+29.7×45.5
=29.7×(10+44.5+45.5)
=29.7×100
=2970