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能简算的要简算 34×57×89 1-12×27÷34 49÷35+59÷35 [815-(45-310)]×1514.

编辑:chaxungu时间:2026-04-27 13:18:59分类:小学数学题库

能简算的要简算
3
4
×
5
7
×
8
9
1-
1
2
×
2
7
÷
3
4
4
9
÷
3
5
+
5
9
÷
3
5
[
8
15
-(
4
5
-
3
10
)]×
15
14
.
(1)
3
4
×
5
7
×
8
9
,
=
3
4
×
8
9
×
5
7
,
=
2
3
×
5
7
,
=
10
21
;

(2)1-
1
2
×
2
7
÷
3
4
,
=1-
1
7
÷
3
4
,
=1-
4
21
,
=
17
21
;

(3)
4
9
÷
3
5
+
5
9
÷
3
5
,
=
4
9
×
5
3
+
5
9
×
5
3
,
=(
4
9
+
5
9
)×
5
3
,
=1×
5
3
,
=
5
3
;

(4)[
8
15
-(
4
5
-
3
10
)]×
15
14
,
=[
8
15
-
1
2
]×
15
14
,
=
8
15
×
15
14
-
1
2
×
15
14
,
=
4
7
-
15
28
,
=
1
28
.