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选用适当的方法计算.57+56+27+16115×(13+112)13+3÷1214÷(3-513-813)
题目详情
选用适当的方法计算.
+
+
+
×(
+
)
+3÷
÷(3-
-
)
+
+
+
×(
+
)
+3÷
÷(3-
-
)
5 5 7 7
+
+
×(
+
)
+3÷
÷(3-
-
)
5 5 6 6
+
×(
+
)
+3÷
÷(3-
-
)
2 2 7 7
×(
+
)
+3÷
÷(3-
-
)
1 1 6 6
×(
+
)
+3÷
÷(3-
-
)
1 1 15 15
+
)
+3÷
÷(3-
-
)
1 1 3 3
)
+3÷
÷(3-
-
)
1 1 12 12
+3÷
÷(3-
-
)
1 1 3 3
÷(3-
-
)
1 1 2 2
÷(3-
-
)
1 1 4 4
-
)
5 5 13 13
)
8 8 13 13
5 |
7 |
5 |
6 |
2 |
7 |
1 |
6 |
1 |
15 |
1 |
3 |
1 |
12 |
1 |
3 |
1 |
2 |
1 |
4 |
5 |
13 |
8 |
13 |
5 |
7 |
5 |
6 |
2 |
7 |
1 |
6 |
1 |
15 |
1 |
3 |
1 |
12 |
1 |
3 |
1 |
2 |
1 |
4 |
5 |
13 |
8 |
13 |
5 |
7 |
5 |
6 |
2 |
7 |
1 |
6 |
1 |
15 |
1 |
3 |
1 |
12 |
1 |
3 |
1 |
2 |
1 |
4 |
5 |
13 |
8 |
13 |
5 |
6 |
2 |
7 |
1 |
6 |
1 |
15 |
1 |
3 |
1 |
12 |
1 |
3 |
1 |
2 |
1 |
4 |
5 |
13 |
8 |
13 |
2 |
7 |
1 |
6 |
1 |
15 |
1 |
3 |
1 |
12 |
1 |
3 |
1 |
2 |
1 |
4 |
5 |
13 |
8 |
13 |
1 |
6 |
1 |
15 |
1 |
3 |
1 |
12 |
1 |
3 |
1 |
2 |
1 |
4 |
5 |
13 |
8 |
13 |
1 |
15 |
1 |
3 |
1 |
12 |
1 |
3 |
1 |
2 |
1 |
4 |
5 |
13 |
8 |
13 |
1 |
3 |
1 |
12 |
1 |
3 |
1 |
2 |
1 |
4 |
5 |
13 |
8 |
13 |
1 |
12 |
1 |
3 |
1 |
2 |
1 |
4 |
5 |
13 |
8 |
13 |
1 |
3 |
1 |
2 |
1 |
4 |
5 |
13 |
8 |
13 |
1 |
2 |
1 |
4 |
5 |
13 |
8 |
13 |
1 |
4 |
5 |
13 |
8 |
13 |
5 |
13 |
8 |
13 |
8 |
13 |
▼优质解答
答案和解析
(1)
+
+
+
=(
+
)+(
+
)
=1+1
=2;
(2)
×(
+
)
=
×
=
;
(3)
+3÷
=
+6
=6
;
(4)
÷(3-
-
)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
5 5 57 7 7+
+
+
=(
+
)+(
+
)
=1+1
=2;
(2)
×(
+
)
=
×
=
;
(3)
+3÷
=
+6
=6
;
(4)
÷(3-
-
)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
5 5 56 6 6+
+
=(
+
)+(
+
)
=1+1
=2;
(2)
×(
+
)
=
×
=
;
(3)
+3÷
=
+6
=6
;
(4)
÷(3-
-
)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
2 2 27 7 7+
=(
+
)+(
+
)
=1+1
=2;
(2)
×(
+
)
=
×
=
;
(3)
+3÷
=
+6
=6
;
(4)
÷(3-
-
)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
1 1 16 6 6
=(
+
)+(
+
)
=1+1
=2;
(2)
×(
+
)
=
×
=
;
(3)
+3÷
=
+6
=6
;
(4)
÷(3-
-
)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
5 5 57 7 7+
)+(
+
)
=1+1
=2;
(2)
×(
+
)
=
×
=
;
(3)
+3÷
=
+6
=6
;
(4)
÷(3-
-
)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
2 2 27 7 7)+(
+
)
=1+1
=2;
(2)
×(
+
)
=
×
=
;
(3)
+3÷
=
+6
=6
;
(4)
÷(3-
-
)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
1 1 16 6 6+
)
=1+1
=2;
(2)
×(
+
)
=
×
=
;
(3)
+3÷
=
+6
=6
;
(4)
÷(3-
-
)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
5 5 56 6 6)
=1+1
=2;
(2)
×(
+
)
=
×
=
;
(3)
+3÷
=
+6
=6
;
(4)
÷(3-
-
)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
1 1 115 15 15×(
+
)
=
×
=
;
(3)
+3÷
=
+6
=6
;
(4)
÷(3-
-
)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
1 1 13 3 3+
)
=
×
=
;
(3)
+3÷
=
+6
=6
;
(4)
÷(3-
-
)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
1 1 112 12 12)
=
×
=
;
(3)
+3÷
=
+6
=6
;
(4)
÷(3-
-
)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
1 1 115 15 15×
=
;
(3)
+3÷
=
+6
=6
;
(4)
÷(3-
-
)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
5 5 512 12 12
=
;
(3)
+3÷
=
+6
=6
;
(4)
÷(3-
-
)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
1 1 136 36 36;
(3)
+3÷
=
+6
=6
;
(4)
÷(3-
-
)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
1 1 13 3 3+3÷
=
+6
=6
;
(4)
÷(3-
-
)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
1 1 12 2 2
=
+6
=6
;
(4)
÷(3-
-
)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
1 1 13 3 3+6
=6
;
(4)
÷(3-
-
)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
1 1 13 3 3;
(4)
÷(3-
-
)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
1 1 14 4 4÷(3-
-
)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
5 5 513 13 13-
)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
8 8 813 13 13)
=
÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
1 1 14 4 4÷[3-(
+
)]
=
÷(3-1)
=
÷2
=
.
5 5 513 13 13+
)]
=
÷(3-1)
=
÷2
=
.
8 8 813 13 13)]
=
÷(3-1)
=
÷2
=
.
1 1 14 4 4÷(3-1)
=
÷2
=
.
1 1 14 4 4÷2
=
.
1 1 18 8 8.
5 |
7 |
5 |
6 |
2 |
7 |
1 |
6 |
=(
5 |
7 |
2 |
7 |
1 |
6 |
5 |
6 |
=1+1
=2;
(2)
1 |
15 |
1 |
3 |
1 |
12 |
=
1 |
15 |
5 |
12 |
=
1 |
36 |
(3)
1 |
3 |
1 |
2 |
=
1 |
3 |
=6
1 |
3 |
(4)
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
5 |
7 |
5 |
6 |
2 |
7 |
1 |
6 |
=(
5 |
7 |
2 |
7 |
1 |
6 |
5 |
6 |
=1+1
=2;
(2)
1 |
15 |
1 |
3 |
1 |
12 |
=
1 |
15 |
5 |
12 |
=
1 |
36 |
(3)
1 |
3 |
1 |
2 |
=
1 |
3 |
=6
1 |
3 |
(4)
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
5 |
6 |
2 |
7 |
1 |
6 |
=(
5 |
7 |
2 |
7 |
1 |
6 |
5 |
6 |
=1+1
=2;
(2)
1 |
15 |
1 |
3 |
1 |
12 |
=
1 |
15 |
5 |
12 |
=
1 |
36 |
(3)
1 |
3 |
1 |
2 |
=
1 |
3 |
=6
1 |
3 |
(4)
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
2 |
7 |
1 |
6 |
=(
5 |
7 |
2 |
7 |
1 |
6 |
5 |
6 |
=1+1
=2;
(2)
1 |
15 |
1 |
3 |
1 |
12 |
=
1 |
15 |
5 |
12 |
=
1 |
36 |
(3)
1 |
3 |
1 |
2 |
=
1 |
3 |
=6
1 |
3 |
(4)
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
1 |
6 |
=(
5 |
7 |
2 |
7 |
1 |
6 |
5 |
6 |
=1+1
=2;
(2)
1 |
15 |
1 |
3 |
1 |
12 |
=
1 |
15 |
5 |
12 |
=
1 |
36 |
(3)
1 |
3 |
1 |
2 |
=
1 |
3 |
=6
1 |
3 |
(4)
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
5 |
7 |
2 |
7 |
1 |
6 |
5 |
6 |
=1+1
=2;
(2)
1 |
15 |
1 |
3 |
1 |
12 |
=
1 |
15 |
5 |
12 |
=
1 |
36 |
(3)
1 |
3 |
1 |
2 |
=
1 |
3 |
=6
1 |
3 |
(4)
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
2 |
7 |
1 |
6 |
5 |
6 |
=1+1
=2;
(2)
1 |
15 |
1 |
3 |
1 |
12 |
=
1 |
15 |
5 |
12 |
=
1 |
36 |
(3)
1 |
3 |
1 |
2 |
=
1 |
3 |
=6
1 |
3 |
(4)
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
1 |
6 |
5 |
6 |
=1+1
=2;
(2)
1 |
15 |
1 |
3 |
1 |
12 |
=
1 |
15 |
5 |
12 |
=
1 |
36 |
(3)
1 |
3 |
1 |
2 |
=
1 |
3 |
=6
1 |
3 |
(4)
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
5 |
6 |
=1+1
=2;
(2)
1 |
15 |
1 |
3 |
1 |
12 |
=
1 |
15 |
5 |
12 |
=
1 |
36 |
(3)
1 |
3 |
1 |
2 |
=
1 |
3 |
=6
1 |
3 |
(4)
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
1 |
15 |
1 |
3 |
1 |
12 |
=
1 |
15 |
5 |
12 |
=
1 |
36 |
(3)
1 |
3 |
1 |
2 |
=
1 |
3 |
=6
1 |
3 |
(4)
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
1 |
3 |
1 |
12 |
=
1 |
15 |
5 |
12 |
=
1 |
36 |
(3)
1 |
3 |
1 |
2 |
=
1 |
3 |
=6
1 |
3 |
(4)
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
1 |
12 |
=
1 |
15 |
5 |
12 |
=
1 |
36 |
(3)
1 |
3 |
1 |
2 |
=
1 |
3 |
=6
1 |
3 |
(4)
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
1 |
15 |
5 |
12 |
=
1 |
36 |
(3)
1 |
3 |
1 |
2 |
=
1 |
3 |
=6
1 |
3 |
(4)
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
5 |
12 |
=
1 |
36 |
(3)
1 |
3 |
1 |
2 |
=
1 |
3 |
=6
1 |
3 |
(4)
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
1 |
36 |
(3)
1 |
3 |
1 |
2 |
=
1 |
3 |
=6
1 |
3 |
(4)
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
1 |
3 |
1 |
2 |
=
1 |
3 |
=6
1 |
3 |
(4)
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
1 |
2 |
=
1 |
3 |
=6
1 |
3 |
(4)
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
1 |
3 |
=6
1 |
3 |
(4)
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
1 |
3 |
(4)
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
5 |
13 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
8 |
13 |
=
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
1 |
4 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
5 |
13 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
8 |
13 |
=
1 |
4 |
=
1 |
4 |
=
1 |
8 |
1 |
4 |
=
1 |
4 |
=
1 |
8 |
1 |
4 |
=
1 |
8 |
1 |
8 |
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甲乙股票(单位:元)星期一二三四五甲1212.512.912.4512.75乙13.513.313 2020-07-19 …
要方程.收盘价(元/股)星期一星期二星期三星期四星期五甲1212.512.912.4512.75乙 2020-07-19 …
下表是某一周甲、乙两种股票每天的收盘价(收盘价是每天股票交易结束时的价格)时间收盘价(元/股)名称 2020-07-19 …
我国古代用地支记时,地支记时是用当地时间,每天十二个时辰,一天中的7-9时为辰时,9-11时为巳时 2020-07-23 …
(2014•淄博三模)如图是一组样本数据的频率分布直方图,则依据图形中的数据,可以估计总体的平均数 2020-07-29 …
我国古代用地支记时,地支记时是用当地时间,每天十二个时辰,一天中的7-9时为辰时,9-11时为巳时, 2020-12-01 …