2.46×0.8+1.23×0.4的简便运算

问题描述:

2.46×0.8+1.23×0.4的简便运算

2.46×0.8+1.23×0.4
=2.46×0.8+1.23×2×0.2
=2.46×(0.8+0.2)
=2.46×1
=2.46