计算 (1)18-(41/2-50); (2)(7+43)(7-43)-(35-1)2.

问题描述:

计算
(1)

18
-(4
1
2
-
50
);
(2)(7+4
3
)(7-4
3
)-(3
5
-1)2

(1)原式=3

2
-2
2
+5
2

=6
2

(2)原式=49-48-(45-6
5
+1)
=1-46+6
5

=-45+6
5