8.1除以4.2减0.3除以2.1加7分之3怎么算
问题描述:
8.1除以4.2减0.3除以2.1加7分之3怎么算
答
8.1除以4.2减0.3除以2.1加7分之3
=8.1÷4.2-0.6÷4.2+3/7
=(8.1-0.6)÷4.2+3/7
=7.5÷4.2+3/7
=12.5/7+3/7
=15.5/7
=31/14