问题
解答题
混合运算(能简便的要简便)
2-
|
答案
-5 8
+3 5 1 4
=
+1 40 1 4
=
;11 40
2-
-1 9 8 9
=2-(
+1 9
)8 9
=2-1
=1;
+(11 20
-9 10
)1 5
=
+11 20 7 10
=
.5 4
混合运算(能简便的要简便)
2-
|
-5 8
+3 5 1 4
=
+1 40 1 4
=
;11 40
2-
-1 9 8 9
=2-(
+1 9
)8 9
=2-1
=1;
+(11 20
-9 10
)1 5
=
+11 20 7 10
=
.5 4