题目内容

用递等式计算
3
7
÷(
7
10
-
1
6
0.8×(3.75-0.3)÷0.1
2
3
-
5
3
×
3
8
)÷
7
16
17
19
÷(
1
4
+
2
7
×
7
8
(1)
3
7
÷(
7
10
-
1
6
),
=
3
7
÷
16
30

=
3
7
×
30
16

=
45
56


(2)0.8×(3.75-0.3)÷0.1,
=0.8×3.45÷0.1,
=2.76÷0.1,
=27.6;

(3)(
2
3
-
5
3
×
3
8
)÷
7
16

=(
2
3
-
5
8
)÷
7
16

=
1
24
÷
7
16

=
2
21


(4)
17
19
÷(
1
4
+
2
7
×
7
8
),
=
17
19
÷(
1
4
+
1
4
),
=
17
19
÷
1
2

=
34
19
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