这道五年级的简便运算题怎么做?20.5-(3.64+2.8)/0.4要过程!谢谢啦!
2019-04-15
这道五年级的简便运算题怎么做?
20.5-(3.64+2.8)/0.4
要过程!
谢谢啦!
优质解答
20.5-(3.64+0.36+2.8-0.36)/0.4
=20.5-(4+2.8-0.36)/0.4
=20.5-10+7-0.9
=4.4
20.5-(3.64+0.36+2.8-0.36)/0.4
=20.5-(4+2.8-0.36)/0.4
=20.5-10+7-0.9
=4.4