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递等式计算 79×511+29×511 5-5×25+35[12-(34-35)]÷710.

编辑:chaxungu时间:2026-04-27 14:16:56分类:小学数学题库

递等式计算
7
9
×
5
11
+
2
9
×
5
11

5-5×
2
5
+
3
5

[
1
2
-(
3
4
-
3
5
)]÷
7
10
.(1)
7
9
×
5
11
+
2
9
×
5
11
,
=
5
11
×(
7
9
+
2
9
),
=
5
11
×1,
=
5
11
;

(2)5-5×
2
5
+
3
5
,
=5-2+
3
5
,
=3
3
5
;

(3)[
1
2
-(
3
4
-
3
5
)]÷
7
10
,
=[
1
2
-
3
20
]÷
7
10
,
=
7
20
×
10
7
,
=
1
2
.