简便计算3.6*0.45+0.36*4.2+0.036*13

问题描述:

简便计算3.6*0.45+0.36*4.2+0.036*13

3.6×0.45+0.36×4.2+0.036×13……………………变一变,就简便.
=3.6×0.45+3.6×0.42+3.6×0.13
=3.6×(0.45+0.42+0.13)
=3.6×1
=3.6