计算:(-2/3)-(-13/4)-(-12/3)-(+1.75).

问题描述:

计算:(-

2
3
)-(-1
3
4
)-(-1
2
3
)-(+1.75).

(-

2
3
)-(-1
3
4
)-(-1
2
3
)-(+1.75)
=-
2
3
+1
2
3
+1
3
4
-1.75
=1.