怎样简便就怎样算.20×25×34(34+23+124)÷112711×27+711×57.-数学

题目简介

怎样简便就怎样算.20×25×34(34+23+124)÷112711×27+711×57.-数学

题目详情

怎样简便就怎样算.
20×
2
5
×
3
4
3
4
+
2
3
+
1
24
)÷
1
12
7
11
×
2
7
+
7
11
×
5
7
题型:解答题难度:中档来源:不详

答案

(1)20×class="stub"2
5
×class="stub"3
4

=8×class="stub"3
4

=6;

(2)(class="stub"3
4
+class="stub"2
3
+class="stub"1
24
)÷class="stub"1
12

=(class="stub"3
4
+class="stub"2
3
+class="stub"1
24
)×12,
=class="stub"3
4
×12+class="stub"2
3
×12+class="stub"1
24
×12,
=9+8+class="stub"1
2

=17class="stub"1
2


(3)class="stub"7
11
×class="stub"2
7
+class="stub"7
11
×class="stub"5
7

=(class="stub"2
7
+class="stub"5
7
)×class="stub"7
11

=1×class="stub"7
11

=class="stub"7
11

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