(19/4×3/7+19/4×4/7)÷8/19简便运算
问题描述:
(19/4×3/7+19/4×4/7)÷8/19简便运算
答
(19/4×3/7+19/4×4/7)÷8/19
=[﹙3/7﹢4/7﹚×19/4]÷8/19
=19/4×19/8
=361/32