问题 解答题
计算下面各题.
8470-104×65
7.12×4-1.12÷0.25
72×(
5
9
-
5
12
)
+10
1
6
+
1
9
-
1
12
)×3
1-
1
6
÷
5
12

1
7
9
×[(
3
8
+0.25)÷(
5
6
-
5
9
)].
答案

(1)8470-104×65,

=8470-6760,

=1710;

(2)7.12×4-1.12÷0.25,

=28.48-4.48,

=24;

(3)72×(

5
9
-
5
12
)+10,

=72×

5
9
-72×
5
12
+10,

=40-30+10,

=20;

(4)(

1
6
+
1
9
-
1
12
)×3,

=

1
6
×3+
1
9
×3-
1
12
×3,

=

1
2
+
1
3
-
1
4

=

6
12
+
4
12
-
3
12

=

7
12

(5)1-

1
6
÷
5
12

=1-

2
5

=

3
5

(6)1

7
9
×[(
3
8
+0.25)÷(
5
6
-
5
9
)],

=1

7
9
×[(
3
8
+0.25)÷(
5
6
-
5
9
)],

=1

7
9
×[
5
8
÷
5
18
],

=1

7
9
×
9
4

=4.

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