问题 解答题
用递等式计算. (能简算的要简算)
3
5
×(
5
12
÷
3
4
5
6
+
7
12
÷
1
2
3.7×99+3.7
3
7
+
5
11
+
4
7
+
6
11
360÷15+2.5×16
2
3
÷〔1-(
1
3
-
1
4
)〕
答案

(1)

3
5
×(
5
12
÷
3
4
),

=

3
5
×
5
9

=

1
3

(2)

5
6
+
7
12
÷
1
2

=

5
6
+
7
6

=2;

(3)3.7×99+3.7,

=3.7×(99+1),

=3.7×100,

=370;

(4)

3
7
+
5
11
+
4
7
+
6
11

=(

3
7
+
4
7
)+(
5
11
+
6
11
),

=1+1,

=2;

(5)360÷15+2.5×16,

=24+40,

=64;

(6)

2
3
÷〔1-(
1
3
-
1
4
)〕,

=

2
3
÷〔1-
1
12
〕,

=

2
3
÷
11
12

=

8
11

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