如题所述
第1个回答 2019-05-11
(483-171)÷4
=312÷4
=(400-88)÷4
=100-22
=78本回答被网友采纳
=312÷4
=(400-88)÷4
=100-22
=78本回答被网友采纳
第2个回答 2019-05-11
(483-171)÷4
=312÷4
=78
=312÷4
=78
第3个回答 2019-05-11
(483-171)÷4
=312÷4
=320÷4-8÷4
=80-2
=78
=312÷4
=320÷4-8÷4
=80-2
=78