计算下面各题,能用简便算法的用简便算法.14×27-512×131516+(716-14)÷12[1-(14+38)]÷14512×3130+3130×712.-六年级数学

题目简介

计算下面各题,能用简便算法的用简便算法.14×27-512×131516+(716-14)÷12[1-(14+38)]÷14512×3130+3130×712.-六年级数学

题目详情

计算下面各题,能用简便算法的用简便算法.
14×
2
7
-
5
12
×
1
3

15
16
+(
7
16
-
1
4
)÷
1
2

[1-(
1
4
+
3
8
)]÷
1
4

5
12
×
31
30
+
31
30
×
7
12
题型:解答题难度:中档来源:不详

答案

(1)14×class="stub"2
7
-class="stub"5
12
×class="stub"1
3

=4-class="stub"5
36

=3class="stub"31
36


(2)class="stub"15
16
+(class="stub"7
16
-class="stub"1
4
)÷class="stub"1
2

=class="stub"15
16
+class="stub"3
16
÷class="stub"1
2

=class="stub"15
16
+class="stub"6
16

=class="stub"21
16


(3)[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,

(4)class="stub"5
12
×class="stub"31
30
+class="stub"31
30
×class="stub"7
12

=(class="stub"5
12
+class="stub"7
12
)×class="stub"31
30

=1×class="stub"31
30

=class="stub"31
30

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