问题
解答题
怎样简便就怎样算：
11-
12×（
|
答案
算：
+(2 3
-4 5
)×2 3 5 3
=
+2 3
×4 5
-5 3
×2 3 5 3
=
+2 3
-4 3 10 9
=2-10 9
=
；8 9
÷3 4
+0.75×81 6
=
×6+3 4
×83 4
=
×（6+8）3 4
=
×143 4
=
； 21 2
11-
-2.1257 8
=11-0.875-2.125
=11-（0.875+1.125）
=11-2
=9；
12×（
+1 4
-1 6
）1 3
=12×
+12×1 4
-12×1 6 1 3
=3+2-4
=1．