计算(1)1.3×14-12×0.25+0.2÷4(2)[(113-815)×75%+14]÷1720(3)[14.8+(627-4.5)×1325]÷223(4)12+16+112+120+130+

题目简介

计算(1)1.3×14-12×0.25+0.2÷4(2)[(113-815)×75%+14]÷1720(3)[14.8+(627-4.5)×1325]÷223(4)12+16+112+120+130+

题目详情

计算
(1)1.3×
1
4
-
1
2
×0.25+0.2÷4
(2)[(1
1
3
-
8
15
)
×75%+
1
4
17
20

(3)[14.8+(6
2
7
-4.5)×1
3
25
2
2
3

(4)
1
2
+
1
6
+
1
12
+
1
20
+
1
30
+
1
42
题型:解答题难度:中档来源:不详

答案

(1)1.3×class="stub"1
4
-class="stub"1
2
×0.25+0.2÷4,
=1.3×class="stub"1
4
-0.5×class="stub"1
4
+0.2×class="stub"1
4

=(1.3-0.5+0.2)×class="stub"1
4

=1×class="stub"1
4

=class="stub"1
4


(2)[(1class="stub"1
3
-class="stub"8
15
)
×75%+class="stub"1
4
class="stub"17
20

=[(class="stub"4
3
-class="stub"8
15
)×class="stub"3
4
+class="stub"1
4
class="stub"17
20

=[class="stub"4
5
×class="stub"3
4
+class="stub"1
4
class="stub"17
20

=[class="stub"3
5
+class="stub"1
4
]÷class="stub"17
20

=class="stub"17
20
÷class="stub"17
20

=1;

(3)[14.8+(6class="stub"2
7
-4.5)×1class="stub"3
25
2class="stub"2
3

=[14.8+(class="stub"44
7
-class="stub"9
2
)×class="stub"28
25
2class="stub"2
3

=[14.8+class="stub"25
14
×class="stub"28
25
2class="stub"2
3

=[14.8+2]÷2class="stub"2
3

=16class="stub"4
5
÷2class="stub"2
3

=class="stub"84
5
×class="stub"3
8

=class="stub"63
10


(4)class="stub"1
2
+class="stub"1
6
+class="stub"1
12
+class="stub"1
20
+class="stub"1
30
+class="stub"1
42

=(1-class="stub"1
2
)+(class="stub"1
2
-class="stub"1
3
)+(class="stub"1
3
-class="stub"1
4
)+(class="stub"1
4
-class="stub"1
5
)+(class="stub"1
5
-class="stub"1
6
)+(class="stub"1
6
-class="stub"1
7
),
=1-class="stub"1
2
+class="stub"1
2
-class="stub"1
3
+class="stub"1
3
-class="stub"1
4
+class="stub"1
4
-class="stub"1
5
+class="stub"1
5
-class="stub"1
6
+class="stub"1
6
-class="stub"1
7

=1-class="stub"1
7

=class="stub"6
7

更多内容推荐