用合理的方法计算:(1)23+13×34(2)20052006×2007(3)(58+127)×8+1927(4)35×(17+821÷23)(5)16÷[1÷(35-310)].-数学

题目简介

用合理的方法计算:(1)23+13×34(2)20052006×2007(3)(58+127)×8+1927(4)35×(17+821÷23)(5)16÷[1÷(35-310)].-数学

题目详情

用合理的方法计算:
(1)
2
3
+
1
3
×
3
4

(2)
2005
2006
×2007

(3)(
5
8
+
1
27
)×8+
19
27

(4)
3
5
×
1
7
+
8
21
÷
2
3

(5)
1
6
÷
[1÷(
3
5
-
3
10
)].
题型:解答题难度:中档来源:不详

答案

(1)class="stub"2
3
+class="stub"1
3
×class="stub"3
4

=class="stub"2
3
+class="stub"1
4

=class="stub"8
12
+class="stub"3
12

=class="stub"11
12

(2)class="stub"2005
2006
×2007

=class="stub"2005
2006
×
(2006+1),
=class="stub"2005
2006
×
2006+class="stub"2005
2006

=2005+class="stub"2005
2006

=2005class="stub"2005
2006

(3)(class="stub"5
8
+class="stub"1
27
)×8+class="stub"19
27

=class="stub"5
8
×
8+class="stub"1
27
×
8+class="stub"19
27

=5+(class="stub"8
27
+class="stub"19
27
),
=5+1,
=6;
(4)class="stub"3
5
×
class="stub"1
7
+class="stub"8
21
÷class="stub"2
3
),
=class="stub"3
5
×(class="stub"1
7
+class="stub"8
21
×class="stub"3
2
),
=class="stub"3
5
×(class="stub"1
7
+class="stub"4
7
),
=class="stub"3
5
×
class="stub"5
7

=class="stub"3
7

(5)class="stub"1
6
÷
[1÷(class="stub"3
5
-class="stub"3
10
)],
=class="stub"1
6
÷[1÷(class="stub"6
10
-class="stub"3
10
)],
=class="stub"1
6
÷[1÷class="stub"3
10
],
=class="stub"1
6
÷class="stub"10
3

=class="stub"1
6
×class="stub"3
10

=class="stub"1
20

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