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计算. 5400-2940÷28×27, ÷4.2, (45+14)÷73+710, 10÷[83-(513÷526+25)].

编辑:chaxungu时间:2026-04-27 13:21:23分类:小学数学题库

计算.
5400-2940÷28×27;(20.2×0.4+7.88)÷4.2;
(
4
5
+
1
4
)÷
7
3
+
7
10
;
10÷[
8
3
-(
5
13
÷
5
26
+
2
5
)].
(1)5400-2940÷28×27
=5400-105×27,
=5400-2835,
=2565;

(2)(20.2×0.4+7.88)÷4.2
=(8.08+7.88)÷4.2,
=15.96÷4.2,
=3.8;

(3)(
4
5
+
1
4
)÷
7
3
+
7
10

=
21
20
÷
7
3
+
7
10
,
=
9
20
+
7
10
,
=1
3
20
;
(4)10÷[
8
3
-(
5
13
÷
5
26
+
2
5
)]
=10÷[
8
3
-(2+
2
5
)],
=10÷[
8
3
-
12
5
],
=10÷
4
15
,
=37
1
2
.