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用简便方法计算下面各题.1712×534×3457×72-57×231417+1417×16(14+16)×2418×5×8965×3+65×6+65.

编辑:chaxungu时间:2026-04-27 14:17:30分类:小学数学题库

用简便方法计算下面各题.
17
12
×
5
34
×
3
4

5
7
×72-
5
7
×23
14
17
+
14
17
×16
(
1
4
+
1
6
)×24
1
8
×5×
8
9

6
5
×3+
6
5
×6+
6
5
.(1)
17
12
×
5
34
×
3
4

=
5
32


(2)
5
7
×72-
5
7
×23,
=
5
7
×(72-23),
=
5
7
×49,
=35;

(3)
14
17
+
14
17
×16,
=
14
17
×(1+16),
=14;

(4)(
1
4
+
1
6
)×24,
=
1
4
×24+
1
6
×24,
=6+4,
=10;

(5)
1
8
×5×
8
9

=
5
9


(6)
6
5
×3+
6
5
×6+
6
5

=
6
5
×(3+6+1),
=
6
5
×10,
=12.