数学简便运算:3.64×0.8+6.36×0.8-3.8

问题描述:

数学简便运算:3.64×0.8+6.36×0.8-3.8

3.64×0.8+6.36×0.8-3.8
=0.8×(3.64+6.36)-3.8
=0.8×10-3.8
=8-3.8
=4.2
祝学习进步