计算下列各式:(1)89×[34-(716-0.25)](2)627-223×148+313÷59(3)[13+(45-23)×53]÷89(4)(512-516)×45+23-34.-数学

题目简介

计算下列各式:(1)89×[34-(716-0.25)](2)627-223×148+313÷59(3)[13+(45-23)×53]÷89(4)(512-516)×45+23-34.-数学

题目详情

计算下列各式:
(1)
8
9
×[
3
4
-(
7
16
-0.25)]

(2)6
2
7
-2
2
3
×1
4
8
+3
1
3
÷
5
9

(3)[
1
3
+(
4
5
-
2
3
5
3
]÷
8
9

(4)(
5
12
-
5
16
4
5
+
2
3
-
3
4
题型:解答题难度:中档来源:不详

答案


(1)class="stub"8
9
×[class="stub"3
4
-(class="stub"7
16
-0.25)]

=class="stub"8
9
×[class="stub"3
4
-class="stub"3
16
]

=class="stub"8
9
×class="stub"9
16

=class="stub"1
2


(2)6class="stub"2
7
-2class="stub"2
3
×1class="stub"4
8
+3class="stub"1
3
÷class="stub"5
9

=6class="stub"2
7
-4+6

=2class="stub"2
7
+6,
=8class="stub"2
7


(3)[class="stub"1
3
+(class="stub"4
5
-class="stub"2
3
)×class="stub"5
3
]÷class="stub"8
9

=[class="stub"1
3
+class="stub"2
15
×class="stub"5
3
]÷class="stub"8
9

=[class="stub"1
3
+class="stub"2
9
]÷class="stub"8
9

=class="stub"5
9
÷class="stub"8
9

=class="stub"5
8


(4)(class="stub"5
12
-class="stub"5
16
)×class="stub"4
5
+class="stub"2
3
-class="stub"3
4

=class="stub"5
48
×class="stub"4
5
+class="stub"2
3
-class="stub"3
4

=class="stub"1
12
+class="stub"2
3
-class="stub"3
4

=class="stub"3
4
-class="stub"3
4

=0.

更多内容推荐