7.5×3⼀4+2.5÷4⼀3简便方法

7.5×3/4+2.5÷4/3简便方法
2025-06-26 11:40:29
推荐回答(1个)
回答1:

=7.5×3/4+2.5×3/4
=3/4×(7.5+2.5)
=3/4×10
=7.5