计算(能简算的要简算)(1)17×(1927×7)(2)72×59-14(3)4-512×412(4)13×56+13×12.-数学

题目简介

计算(能简算的要简算)(1)17×(1927×7)(2)72×59-14(3)4-512×412(4)13×56+13×12.-数学

题目详情

计算(能简算的要简算)
(1)
1
7
×(
19
27
×7)
(2)72×
5
9
-
1
4

(3)4-
5
12
×
4
12

(4)
1
3
×
5
6
+
1
3
×
1
2
题型:解答题难度:中档来源:不详

答案

(1)class="stub"1
7
×(class="stub"19
27
×7),
=(class="stub"1
7
×7)×class="stub"19
27

=class="stub"19
27


(2)72×class="stub"5
9
-class="stub"1
4

=40-class="stub"1
4

=39class="stub"3
4


(3)4-class="stub"5
12
×class="stub"4
12

=4-class="stub"5
36

=3class="stub"31
36


(4)class="stub"1
3
×class="stub"5
6
+class="stub"1
3
×class="stub"1
2

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

=class="stub"4
9

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