4.5x[(2.3+1.5)0.2]简便方法计算

4.5x[(2.3+1.5)0.2]简便方法计算
2024-11-23 11:46:26
推荐回答(1个)
回答1:

=4.5×(3.8×0.2)
=(4.5×0.2)×3.8
=0.9×3.8
=3.42