用递等式计算（能简便计算的要简便计算）35,4-12.5÷25+1.7

分类: 作业答案 • 2022-02-14 15:12:25

问题描述：

答

35,4-12.5÷25+1.7
=35+4/10-1(2+1/2)/25+17/10
=35+4/10-25/2/25+17/10
=35+4/10-5/10+17/10
=35+16/10
=36.6