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计算下面各题.720+280÷5 36.5×1.4-8.51÷3.7 12÷23-25 (156×413-26)×811 (43+52)÷(2-32) [4-(34-38)]×429.

编辑:chaxungu时间:2026-04-27 13:21:16分类:小学数学题库

计算下面各题.
720+280÷5
36.5×1.4-8.51÷3.7
1
2
÷
2
3
-
2
5
(156×
4
13
-26)×
8
11
(
4
3
+
5
2
)÷(2-
3
2
)
[4-(
3
4
-
3
8
)]×
4
29
.
(1)720+280÷5,
=720+56,
=776;

(2)36.5×1.4-8.51÷3.7,
=51.1-2.3,
=48.4;

(3)
1
2
÷
2
3
-
2
5
,
=
1
2
×
3
2
-
2
5
,
=
3
4
-
2
5
,
=
7
20
;

(4)(156×
4
13
-26)×
8
11
,
=(48-26)×
8
11
,
=22×
8
11
,
=16;

(5)(
4
3
+
5
2
)÷(2-
3
2
),
=
23
6
÷
1
2
,
=
23
6
×2,
=
23
3
;

(6)[4-(
3
4
-
3
8
)]×
4
29
,
=[4-
3
8
]×
4
29
,
=
29
8
×
4
29
,
=
1
2
.