下面各题,怎样简便就怎样算.813÷7+17×613=12×25+910÷920=(12+23+34)×24=713÷[114÷(423-12)]=29+12÷45+38=-数学

题目简介

下面各题,怎样简便就怎样算.813÷7+17×613=12×25+910÷920=(12+23+34)×24=713÷[114÷(423-12)]=29+12÷45+38=-数学

题目详情

下面各题,怎样简便就怎样算.
8
13
÷7+
1
7
×
6
13
=
1
2
×
2
5
+
9
10
÷
9
20
=
1
2
+
2
3
+
3
4
)×24=
7
1
3
÷[1
1
4
÷(4
2
3
-
1
2
)]=
2
9
+
1
2
÷
4
5
+
3
8
=
题型:解答题难度:中档来源:不详

答案

class="stub"8
13
÷7+class="stub"1
7
×class="stub"6
13

=class="stub"8
13
×class="stub"1
7
+class="stub"1
7
×class="stub"6
13

=(class="stub"8
13
+class="stub"6
13
)×class="stub"1
7

=class="stub"14
13
×class="stub"1
7

=class="stub"2
13


class="stub"1
2
×class="stub"2
5
+class="stub"9
10
÷class="stub"9
20

=class="stub"1
5
+class="stub"9
10
×class="stub"20
9

=class="stub"1
5
+2,
=2class="stub"1
5


③(class="stub"1
2
+class="stub"2
3
+class="stub"3
4
)×24,
=class="stub"1
2
×24+class="stub"2
3
×24+class="stub"3
4
×24,
=12+16+18,
=46;

④7class="stub"1
3
÷[1class="stub"1
4
÷(4class="stub"2
3
-class="stub"1
2
)],
=class="stub"22
3
÷[class="stub"5
4
÷class="stub"25
6
],
=class="stub"22
3
÷class="stub"3
10

=24class="stub"4
9


class="stub"2
9
+class="stub"1
2
÷class="stub"4
5
+class="stub"3
8

=class="stub"2
9
+class="stub"5
8
+class="stub"3
8

=class="stub"2
9
+(class="stub"5
8
+class="stub"3
8
),
=class="stub"2
9
+1,
=1class="stub"2
9

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