脱式计算,注意使用简便算法.518÷(56+59)57+27×(310+25)(14-120)×403×49÷389×47+9×37+91522÷[14÷(12-13)].-数学

题目简介

脱式计算,注意使用简便算法.518÷(56+59)57+27×(310+25)(14-120)×403×49÷389×47+9×37+91522÷[14÷(12-13)].-数学

题目详情

脱式计算,注意使用简便算法.
5
18
÷(
5
6
+
5
9
)
5
7
+
2
7
×(
3
10
+
2
5
)
(
1
4
-
1
20
)×40
4
9
÷
3
8
4
7
+9×
3
7
+9
15
22
÷[
1
4
÷(
1
2
-
1
3
)]
题型:解答题难度:中档来源:不详

答案

(1)class="stub"5
18
÷(class="stub"5
6
+class="stub"5
9

=class="stub"5
18
÷class="stub"25
18

=class="stub"1
5


(2)class="stub"5
7
+class="stub"2
7
×(class="stub"3
10
+class="stub"2
5

=class="stub"5
7
+class="stub"2
7
×class="stub"7
10

=class="stub"5
7
+class="stub"1
5

=class="stub"32
35


(3)(class="stub"1
4
-class="stub"1
20
)×40
=class="stub"1
4
×40-class="stub"1
20
×40
=10-2
=8;

(4)3×class="stub"4
9
÷class="stub"3
8

=class="stub"4
3
÷class="stub"3
8

=class="stub"32
9


(5)9×class="stub"4
7
+9×class="stub"3
7
+9
=9×(class="stub"4
7
+class="stub"3
7
+1)
=9×2
=18;

(6)class="stub"15
22
÷[class="stub"1
4
÷(class="stub"1
2
-class="stub"1
3
)]
=class="stub"15
22
÷[class="stub"1
4
÷class="stub"1
6
]
=class="stub"15
22
÷class="stub"3
2

=class="stub"5
11

更多内容推荐