用你喜欢的方法计算.友情提示:可要注意使用简便方法哟!78+(14-15)÷1449×[34-(716-14)]34÷[3.75×(1.2-15)]15×14×(15+17)(13-113)×6-7÷

题目简介

用你喜欢的方法计算.友情提示:可要注意使用简便方法哟!78+(14-15)÷1449×[34-(716-14)]34÷[3.75×(1.2-15)]15×14×(15+17)(13-113)×6-7÷

题目详情

用你喜欢的方法计算.友情提示:可要注意使用简便方法哟!
7
8
+(
1
4
-
1
5
1
4

4
9
×[
3
4
-(
7
16
-
1
4
)]

3
4
÷[3.75×(1.2-
1
5
)]

15×14×(
1
5
+
1
7
)

(
1
3
-
1
13
)×6-7÷13
题型:解答题难度:中档来源:不详

答案

(1)class="stub"7
8
+(class="stub"1
4
-class="stub"1
5
)÷class="stub"1
4

=class="stub"7
8
+class="stub"1
20
×4,
=class="stub"1
8
+class="stub"1
5

=class="stub"13
40


(2)class="stub"4
9
×[class="stub"3
4
-(class="stub"7
16
-class="stub"1
4
)],
=class="stub"4
9
×[class="stub"3
4
+class="stub"1
4
-class="stub"7
16
],
=class="stub"4
9
×[1-class="stub"7
16
],
=class="stub"4
9
×class="stub"9
16

=class="stub"1
4


(3)class="stub"3
4
÷[3.75×(1.2-class="stub"1
5
)],
=class="stub"3
4
÷[3.75×(1.2-0.2)],
=class="stub"3
4
÷[class="stub"15
4
×1],
=class="stub"3
4
÷class="stub"15
4

=class="stub"3
4
×class="stub"4
15

=class="stub"1
5


(4)15×14×(class="stub"1
5
+class="stub"1
7
),
=15×14×class="stub"1
5
+15×14×class="stub"1
7

=42+30,
=72;

(5)(class="stub"1
3
-class="stub"1
13
)×6-7÷13,
=class="stub"1
3
×6-class="stub"1
13
×6-class="stub"7
13

=2-(class="stub"6
13
+class="stub"7
13
),
=2-1,
=1.

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