问题 解答题
计算.
1
2
×
2
3
×
3
4
×
4
5

1
10
+
1
6
)×10×6
1
2
-
3
8
)÷(4÷
8
15

5
11
×[(
2
5
+
1
3
)÷
5
6
].
答案

(1)

1
2
×
2
3
×
3
4
×
4
5

=

1
3
×
3
4
×
4
5

=

1
4
×
4
5

=

1
5

(2)(

1
10
+
1
6
)×10×6,

=

8
30
×10×6,

=

8
3
×6,

=16;

(3)(

1
2
-
3
8
)÷(4÷
8
15
),

=

1
8
÷
15
2

=

1
60

(4)

5
11
×[(
2
5
+
1
3
)÷
5
6
],

=

5
11
×[
11
15
÷
5
6
],

=

5
11
×
22
25

=

2
5

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