(1/3+2/5)÷4/15 5/7×16.31-2.31÷7/5 4÷2/3-8÷1/12
问题描述:
(1/3+2/5)÷4/15 5/7×16.31-2.31÷7/5 4÷2/3-8÷1/12
(1/3+2/5)÷4/15=???????????............5/7×16.31-2.31÷7/5???????????......................4÷2/3-8÷1/12=????????????......................
答
(1/3+2/5)÷4/15
=11/5÷4/15
=33/4
5/7×16.31-2.31÷7/5
=5/7x16.31-2.31x5/7
=5/7x(16.31-2.31)
=5/7x14
=10
4÷2/3-8÷1/12
=6-96
=-90
如果本题有什么不明白可以追问,如果满意请点击“选为满意答案”