下面各题怎样算简便就怎样算57×16-2÷751213×(52-13)(37+35)×7+45.-数学

题目简介

下面各题怎样算简便就怎样算57×16-2÷751213×(52-13)(37+35)×7+45.-数学

题目详情

下面各题怎样算简便就怎样算
5
7
×16-2÷
7
5
12
13
×(
5
2
-
1
3
3
7
+
3
5
)×7+
4
5
题型:解答题难度:中档来源:不详

答案

(1)class="stub"5
7
×16-2÷class="stub"7
5

=class="stub"5
7
×16-2×class="stub"5
7

=class="stub"5
7
×(16-2),
=class="stub"5
7
×14,
=10;


(2)class="stub"12
13
×(class="stub"5
2
-class="stub"1
3
),
=class="stub"12
13
×class="stub"5
2
-class="stub"12
13
×class="stub"1
3

=class="stub"30
13
-class="stub"4
13

=2;


(3)(class="stub"3
7
+class="stub"3
5
)×7+class="stub"4
5

=7×class="stub"3
7
+class="stub"3
5
×7+class="stub"4
5

=3+class="stub"21
5
+class="stub"4
5

=3+(class="stub"21
5
+class="stub"4
5
),
=3+5,
=8.

更多内容推荐