27÷9/4×(-4/9)+4-4×(-1/3)

问题描述:

27÷

9
4
×(-
4
9
)+4-4×(-
1
3

原式=27×

4
9
×(-
4
9
)+4+
4
3

=-
16
3
+4+
4
3

=-4+4
=0.