解,5/9×11/4-7/4÷9/5
=5/9x11/4-7/4x5/9
=5/9×(11/4-7/4)
=5/9
这是一道利用乘法分配律来进行简算的题目,首先将7/4÷9/5转化为7/4×5/9,然后按照分配律简算。
5/9x11/4-7/4÷9/5
=5/9x11/4-7/4×5/9
=5/9×(11/4-7/4)
=5/9×1
=5/9
答:原式=5/9×(11/4-7/4)
=5/9×4/4
=5/9
如图所示
5/9×11/4-7/4÷9/5
=5/9×11/4-7/4×5/9
=5/9×(11/4-7/4)
=5/9×1
=5/9