问题:
问题描述:
就一题数学能简算的要简算、帮帮忙啊
3.8÷3.9+3.9÷0.1+0.1÷3.9
刘会斌回答:
=(3.8+0.1)÷3.9+3.9÷0.1
=3.9÷3.9+39
=1+39
=40