102×7/20用简便方法
第1个回答 2016-09-14
102x7/20
=(100+2)x7/20
=100x7/20+2x7/20
=35+7/10
=35又7/10本回答被网友采纳
=(100+2)x7/20
=100x7/20+2x7/20
=35+7/10
=35又7/10本回答被网友采纳
第2个回答 2016-09-14
=(100+2)x7/20
=100x7/20+2x7/20
=35+0.7
=35,7
=100x7/20+2x7/20
=35+0.7
=35,7