问题 解答题
计算下面各题,能简算的要简算.
0.6×3.3+
3
5
×7.7-0.6             
 (
2
3
+
5
7
-
1
2
)
÷
1
42

9
10
×[
5
9
(
1
2
-
1
6
)]

8
27
÷[(
1
3
-
1
4
)×8]
答案

(1)0.6×3.3+

3
5
×7.7-0.6,

=0.6×3.3+0.6×7.7-0.6,

=(3.3+7.7-1)×0.6,

=10×0.6,

=6;

(2)(

2
3
+
5
7
-
1
2
)÷
1
42

=(

2
3
+
5
7
-
1
2
)×42,

=

2
3
×42+
5
7
×42-
1
2
×42,

=28+30-21,

=37;

(3)

9
10
×[
5
9
×(
1
2
-
1
6
)],

=

9
10
×
5
9
×(
1
2
-
1
6
),

=

1
2
×(
1
2
-
1
6
),

=

1
2
×
1
3

=

1
6

(4)

8
27
÷[(
1
3
-
1
4
)×8],

=

8
27
÷[
1
12
×8],

=

8
27
÷
2
3

=

8
27
×
3
2

=

4
9

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