问题
解答题
|
答案
(1)
+2 5
-1 2 3 4
=
+8 20
-10 20 15 20
=
;3 20
(2)
-(1 4
-2 5
)1 4
=
+1 4
-1 4 2 5
=
-1 2 2 5
=
.1 10
|
(1)
+2 5
-1 2 3 4
=
+8 20
-10 20 15 20
=
;3 20
(2)
-(1 4
-2 5
)1 4
=
+1 4
-1 4 2 5
=
-1 2 2 5
=
.1 10