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计算.34÷78÷1514(49+215)÷215320÷0.2×23.

编辑:chaxungu时间:2026-04-27 14:17:37分类:小学数学题库

计算.
3
4
÷
7
8
÷
15
14

(
4
9
+
2
15
)÷
2
15

3
20
÷0.2×
2
3
.
(1)
3
4
÷
7
8
÷
15
14
,
=
3
4
×
8
7
×
14
15
,
=
4
5
,

(2)(
4
9
+
2
15
)÷
2
15
,
=(
4
9
+
2
15
)×
15
2
,
=
4
9
×
15
2
+
2
15
×
15
2
,
=
10
3
+1,
=4
1
3
,

(3)
3
20
÷0.2×
2
3
,
=
3
20
÷
1
5
×
2
3
,
=
3
20
×5×
2
3
,
=
3
20
×
2
3
×5,
=
1
2
.