计算题:(1)[(23-14)÷56+45]×511(2)(38+56-712)×24(3)920÷[12×(25+45)](4)23+(12+23)×27.-数学

题目简介

计算题:(1)[(23-14)÷56+45]×511(2)(38+56-712)×24(3)920÷[12×(25+45)](4)23+(12+23)×27.-数学

题目详情

计算题:
(1)[(
2
3
-
1
4
)÷
5
6
+
4
5
5
11

(2)(
3
8
+
5
6
-
7
12
)×24
(3)
9
20
÷[
1
2
×(
2
5
+
4
5
)]
(4)
2
3
+(
1
2
+
2
3
)×
2
7
题型:解答题难度:中档来源:不详

答案

(1)[(class="stub"2
3
-class="stub"1
4
)÷class="stub"5
6
+class="stub"4
5
class="stub"5
11

=[class="stub"5
12
÷class="stub"5
6
+class="stub"4
5
class="stub"5
11

=[class="stub"1
2
+class="stub"4
5
class="stub"5
11

=class="stub"13
10
×class="stub"5
11

=class="stub"13
22


(2)(class="stub"3
8
+class="stub"5
6
-class="stub"7
12
)×24,
=(class="stub"29
24
-class="stub"7
12
)×24,
=class="stub"15
24
×24,
=15;

(3)class="stub"9
20
÷[class="stub"1
2
×(class="stub"2
5
+class="stub"4
5
)],
=class="stub"9
20
÷[class="stub"1
2
×class="stub"6
5
],
=class="stub"9
20
÷class="stub"3
5

=0.75;

(4)class="stub"2
3
+(class="stub"1
2
+class="stub"2
3
)×class="stub"2
7

=class="stub"2
3
+class="stub"7
6
×class="stub"2
7

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

=1.

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