正确、合理、灵活地计算.86×485219-(713-1719)-6135÷[(23+15)×113]932÷[43×(13+14-124-14)]521×813+513×521-521.-六年级数学

题目简介

正确、合理、灵活地计算.86×485219-(713-1719)-6135÷[(23+15)×113]932÷[43×(13+14-124-14)]521×813+513×521-521.-六年级数学

题目详情

正确、合理、灵活地计算.
86×
4
85
 
2
19
-(
7
13
-
17
19
)-
6
13
5÷[(
2
3
+
1
5
)×
1
13
]
9
32
÷[
4
3
×(
1
3
+
1
4
-
1
24
-
1
4
)]
5
21
×
8
13
+
5
13
×
5
21
-
5
21
题型:解答题难度:中档来源:不详

答案

(1)86×class="stub"4
85

=(85+1)×class="stub"4
85

=85×class="stub"4
85
+class="stub"4
85

=4+class="stub"4
85

=4class="stub"4
85


(2)class="stub"2
19
-(class="stub"7
13
-class="stub"17
19
)-class="stub"6
13

=class="stub"2
19
-class="stub"7
13
+class="stub"17
19
-class="stub"6
13

=(class="stub"2
19
+class="stub"17
19
)-(class="stub"7
13
+class="stub"6
13

=1-1
=0;

(3)5÷[(class="stub"2
3
+class="stub"1
5
)×class="stub"1
13
]
=5÷[class="stub"13
15
×class="stub"1
13
]
=5÷class="stub"1
15

=5×15
=75;

(4)class="stub"9
32
÷[class="stub"4
3
×(class="stub"1
3
+class="stub"1
4
-class="stub"1
24
-class="stub"1
4
)]
=class="stub"9
32
÷[class="stub"4
3
×(class="stub"1
4
-class="stub"1
4
+class="stub"1
3
-class="stub"1
24
)]
=class="stub"9
32
÷[class="stub"4
3
×class="stub"7
24
]
=class="stub"9
32
÷class="stub"7
18

=class="stub"9
32
×class="stub"18
7

=class="stub"81
112


(5)class="stub"5
21
×class="stub"8
13
+class="stub"5
13
×class="stub"5
21
-class="stub"5
21

=class="stub"5
21
×(class="stub"8
13
+class="stub"5
13
-1)
=class="stub"5
21
×0
=0.

更多内容推荐