计算下列各题.712÷23×47(57+12)÷(45-23)917÷43+34×81734÷(12-38)45×(49+715)-数学

题目简介

计算下列各题.712÷23×47(57+12)÷(45-23)917÷43+34×81734÷(12-38)45×(49+715)-数学

题目详情

计算下列各题.
7
12
÷
2
3
×
4
7

5
7
+
1
2
)÷(
4
5
-
2
3

9
17
÷
4
3
+
3
4
×
8
17

3
4
÷(
1
2
-
3
8

45×(
4
9
+
7
15
题型:解答题难度:中档来源:不详

答案

(1)class="stub"7
12
÷class="stub"2
3
×class="stub"4
7

=class="stub"7
8
×class="stub"4
7

=class="stub"1
2


(2)( class="stub"5
7
+class="stub"1
2
)÷( class="stub"4
5
-class="stub"2
3
),
=class="stub"17
14
÷class="stub"2
15

=class="stub"255
28


(3)class="stub"9
17
÷class="stub"4
3
+class="stub"3
4
×class="stub"8
17

=class="stub"9
17
×class="stub"3
4
+class="stub"3
4
×class="stub"8
17

=(class="stub"9
17
+class="stub"8
17
)×class="stub"3
4

=1×class="stub"3
4

=class="stub"3
4


(4)class="stub"3
4
÷(class="stub"1
2
-class="stub"3
8
),
=class="stub"3
4
÷class="stub"1
8

=6;

(5)45×(class="stub"4
9
+class="stub"7
15
),
=45×class="stub"4
9
+45×class="stub"7
15

=20+21,
=41.

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