用乘法分配律计算下面的题：(1)752×1.25+4.45×12.5+0.035×125（2）0.42×160+36×1.6_数学解答

用乘法分配律计算下面的题：(1)752×1.25+4.45×12.5+0.035×125（2）0.42×160+36×1.6

人气：330 ℃　时间：2020-04-04 12:37:30

解答

(1) 752×1.25+4.45×12.5+0.035×125
=（75.2+4.45+0.35）×12.5
=80×12.5
=1000
(2) 0.42×160+36×1.6
=（42+36）×1.6
=80×1.6
=128