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计算.(能简算的要简算)2321230÷23113.68-(2.53+8.68)932÷[34-(716-14)]38×68-18÷168.

题目详情
计算.(能简算的要简算)
232
1
230
÷231                                 
13.68-(2.53+8.68)
9
32
÷[
3
4
-(
7
16
-
1
4
)]
3
8
×68-
1
8
÷
1
68
▼优质解答
答案和解析
①232
1
230
÷231 
=(231+
231
230
)÷231
=231÷231+
231
230
÷231
=1+
1
230

=1
1
230
                                

②13.68-(2.53+8.68)
=13.68-8.68-2.53
=5-2.53
=2.47

9
32
÷[
3
4
-(
7
16
-
1
4
)]
=
9
32
÷(
3
4
+
1
4
-
7
16

=
9
32
÷(1-
7
16

=
9
32
÷
9
16

=
9
32
×
16
9

=
1
2


3
8
×68-
1
8
÷
1
68

=
3
8
×68-
1
8
×68
=(
3
8
1
8
)×68
=
1
4
×68
=17