计算各题,能简便运算的要写出简算过程.[1-(14+38)]÷1436×(14+16+19)85×386=35×17+13×35=(13+14-124)×2449÷[56-(13-16)].-六年级数

题目简介

计算各题,能简便运算的要写出简算过程.[1-(14+38)]÷1436×(14+16+19)85×386=35×17+13×35=(13+14-124)×2449÷[56-(13-16)].-六年级数

题目详情

计算各题,能简便运算的要写出简算过程.
[1-(
1
4
+
3
8
)]÷
1
4

36×(
1
4
+
1
6
+
1
9

85×
3
86
=
3
5
×17+13×
3
5
=
1
3
+
1
4
-
1
24
)×24
4
9
÷[
5
6
-(
1
3
-
1
6
)].
题型:解答题难度:中档来源:不详

答案

(1)[1-(class="stub"1
4
+class="stub"3
8
)]÷class="stub"1
4

=[1-class="stub"5
8
class="stub"1
4

=class="stub"3
8
÷class="stub"1
4

=1.5;

(2)36×(class="stub"1
4
+class="stub"1
6
+class="stub"1
9

=36×class="stub"1
4
+36×class="stub"1
6
+36×class="stub"1
9

=9+6+4
=19;

(3)85×class="stub"3
86

=86×class="stub"3
86
-1×class="stub"3
86

=3-class="stub"3
86

=2class="stub"83
86


(4)class="stub"3
5
×17+13×class="stub"3
5

=(17+13)×class="stub"3
5

=30×class="stub"3
5

=18;

(5)(class="stub"1
3
+class="stub"1
4
-class="stub"1
24
)×24
=class="stub"1
3
×24+class="stub"1
4
×
24-class="stub"1
24
×
24
=8+6-1
=13;

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

=class="stub"2
3

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