4.9×0.36+0.49×4.2+0.049×22这题这么算?

分类: 作业答案 • 2021-12-20 04:34:01

问题描述：

答

4.9×0.36+0.49×4.2+0.049×22
=4.9x0.36+4.9x0.42+4.9x0.22
=4.9x(0.36+0.42+0.22)
=4.9x1
=4.9