问题 解答题
动手算我能行(能简算的要简算)
12×(
3
4
+
1
3
-
1
6
[1-(
1
2
-
1
4
)]×
2
3
99.6×18+40%×18
3
5
÷[
7
8
×(
1
10
+
1
6
)].
答案

(1)12×(

3
4
+
1
3
-
1
6
),

=12×

3
4
+12×
1
3
-12×
1
6

=9+4-2,

=13-2,

=11;

(2)[1-(

1
2
-
1
4
)]×
2
3

=[1-

1
4
2
3

=

3
4
×
2
3

=

1
2

(3)99.6×18+40%×18,

=(99.6+40%)×18,

=100×18,

=1800;

(4)

3
5
÷[
7
8
×(
1
10
+
1
6
)],

=

3
5
÷[
7
8
×
4
15
],

=

3
5
÷
7
30

=

18
7

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