早教吧作业答案频道 -->其他-->
下面各题怎样简便就怎样算.38-17+5858+(38+29)12+710+25523+6310+313+2.779-(17+27)67-(17+514)3-79-299.28-3313-2213-1813
题目详情
下面各题怎样简便就怎样算.
|
|
| 5
| ||||||||||||||||||||||||
|
| 3-
| 9.28-3
|
下面各题怎样简便就怎样算.
|
|
| 5
| ||||||||||||||||||||||||
|
| 3-
| 9.28-3
|
3 |
8 |
1 |
7 |
5 |
8 |
5 |
8 |
3 |
8 |
2 |
9 |
1 |
2 |
7 |
10 |
2 |
5 |
5
2 |
3 |
3 |
10 |
1 |
3 |
3 |
8 |
1 |
7 |
5 |
8 |
3 |
8 |
1 |
7 |
5 |
8 |
3 |
8 |
1 |
7 |
5 |
8 |
1 |
7 |
5 |
8 |
5 |
8 |
5 |
8 |
3 |
8 |
2 |
9 |
5 |
8 |
3 |
8 |
2 |
9 |
5 |
8 |
3 |
8 |
2 |
9 |
3 |
8 |
2 |
9 |
2 |
9 |
1 |
2 |
7 |
10 |
2 |
5 |
1 |
2 |
7 |
10 |
2 |
5 |
1 |
2 |
7 |
10 |
2 |
5 |
7 |
10 |
2 |
5 |
2 |
5 |
5
2 |
3 |
3 |
10 |
1 |
3 |
2 |
3 |
3 |
10 |
1 |
3 |
2 |
3 |
3 |
10 |
1 |
3 |
3 |
10 |
1 |
3 |
1 |
3 |
7 |
9 |
1 |
7 |
2 |
7 |
6 |
7 |
1 |
7 |
5 |
14 |
7 |
9 |
2 |
9 |
3 |
13 |
2 |
13 |
8 |
13 |
7 |
9 |
1 |
7 |
2 |
7 |
7 |
9 |
1 |
7 |
2 |
7 |
7 |
9 |
1 |
7 |
2 |
7 |
1 |
7 |
2 |
7 |
2 |
7 |
6 |
7 |
1 |
7 |
5 |
14 |
6 |
7 |
1 |
7 |
5 |
14 |
6 |
7 |
1 |
7 |
5 |
14 |
1 |
7 |
5 |
14 |
5 |
14 |
7 |
9 |
2 |
9 |
7 |
9 |
2 |
9 |
7 |
9 |
2 |
9 |
2 |
9 |
3 |
13 |
2 |
13 |
8 |
13 |
3 |
13 |
2 |
13 |
8 |
13 |
3 |
13 |
2 |
13 |
8 |
13 |
2 |
13 |
8 |
13 |
8 |
13 |
▼优质解答
答案和解析
(1)
-
+
=
+
-
=1-
=
;
(2)
+(
+
)
=
+
+
=1+
=1
;
(3)
+
+
=
+
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
3 3 38 8 8-
+
=
+
-
=1-
=
;
(2)
+(
+
)
=
+
+
=1+
=1
;
(3)
+
+
=
+
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
1 1 17 7 7+
=
+
-
=1-
=
;
(2)
+(
+
)
=
+
+
=1+
=1
;
(3)
+
+
=
+
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
5 5 58 8 8
=
+
-
=1-
=
;
(2)
+(
+
)
=
+
+
=1+
=1
;
(3)
+
+
=
+
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
3 3 38 8 8+
-
=1-
=
;
(2)
+(
+
)
=
+
+
=1+
=1
;
(3)
+
+
=
+
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
5 5 58 8 8-
=1-
=
;
(2)
+(
+
)
=
+
+
=1+
=1
;
(3)
+
+
=
+
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
1 1 17 7 7
=1-
=
;
(2)
+(
+
)
=
+
+
=1+
=1
;
(3)
+
+
=
+
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
1 1 17 7 7
=
;
(2)
+(
+
)
=
+
+
=1+
=1
;
(3)
+
+
=
+
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
6 6 67 7 7;
(2)
+(
+
)
=
+
+
=1+
=1
;
(3)
+
+
=
+
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
5 5 58 8 8+(
+
)
=
+
+
=1+
=1
;
(3)
+
+
=
+
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
3 3 38 8 8+
)
=
+
+
=1+
=1
;
(3)
+
+
=
+
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
2 2 29 9 9)
=
+
+
=1+
=1
;
(3)
+
+
=
+
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
5 5 58 8 8+
+
=1+
=1
;
(3)
+
+
=
+
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
3 3 38 8 8+
=1+
=1
;
(3)
+
+
=
+
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
2 2 29 9 9
=1+
=1
;
(3)
+
+
=
+
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
2 2 29 9 9
=1
;
(3)
+
+
=
+
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
2 2 29 9 9;
(3)
+
+
=
+
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
1 1 12 2 2+
+
=
+
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
7 7 710 10 10+
=
+
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
2 2 25 5 5
=
+
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
12 12 1210 10 10+
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
2 2 25 5 5
=
;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
8 8 85 5 5;
(4)5
+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
2 2 23 3 3+6
+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
3 3 310 10 10+3
+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
1 1 13 3 3+2.7
=(5
+3
)+(6
+2
)
=9+9
=18;
(5)
-(
2 2 23 3 3+3
)+(6
+2
)
=9+9
=18;
(5)
-(
1 1 13 3 3)+(6
+2
)
=9+9
=18;
(5)
-(
3 3 310 10 10+2
)
=9+9
=18;
(5)
-(
7 7 710 10 10)
=9+9
=18;
(5)
-(
7 7 79 9 9-(
举报
问题解析 问题解析
(1)可根据加法交律计算.
(2)可根据加法结合律计算.
(3)可通分后按从左到右的顺序计算.
(4)可根据加法交换律与结合律计算.
(5)(6)先算括号中的加法,再算减法.
(7)(8)可根据一个数减几个数,等于用这个数减去这几个数的和的减法性质计算. (1)可根据加法交律计算.
(2)可根据加法结合律计算.
(3)可通分后按从左到右的顺序计算.
(4)可根据加法交换律与结合律计算.
(5)(6)先算括号中的加法,再算减法.
(7)(8)可根据一个数减几个数,等于用这个数减去这几个数的和的减法性质计算.名师点评 名师点评
本题考点: 本题考点:
分数的四则混合运算. 分数的四则混合运算.
考点点评: 考点点评:
完成本题要注意分析式中数据的特点,然后运用合适的方法计算. 完成本题要注意分析式中数据的特点,然后运用合适的方法计算.
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3 |
8 |
1 |
7 |
5 |
8 |
=
3 |
8 |
5 |
8 |
1 |
7 |
=1-
1 |
7 |
=
6 |
7 |
(2)
5 |
8 |
3 |
8 |
2 |
9 |
=
5 |
8 |
3 |
8 |
2 |
9 |
=1+
2 |
9 |
=1
2 |
9 |
(3)
1 |
2 |
7 |
10 |
2 |
5 |
=
12 |
10 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
3 |
8 |
1 |
7 |
5 |
8 |
=
3 |
8 |
5 |
8 |
1 |
7 |
=1-
1 |
7 |
=
6 |
7 |
(2)
5 |
8 |
3 |
8 |
2 |
9 |
=
5 |
8 |
3 |
8 |
2 |
9 |
=1+
2 |
9 |
=1
2 |
9 |
(3)
1 |
2 |
7 |
10 |
2 |
5 |
=
12 |
10 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
1 |
7 |
5 |
8 |
=
3 |
8 |
5 |
8 |
1 |
7 |
=1-
1 |
7 |
=
6 |
7 |
(2)
5 |
8 |
3 |
8 |
2 |
9 |
=
5 |
8 |
3 |
8 |
2 |
9 |
=1+
2 |
9 |
=1
2 |
9 |
(3)
1 |
2 |
7 |
10 |
2 |
5 |
=
12 |
10 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
5 |
8 |
=
3 |
8 |
5 |
8 |
1 |
7 |
=1-
1 |
7 |
=
6 |
7 |
(2)
5 |
8 |
3 |
8 |
2 |
9 |
=
5 |
8 |
3 |
8 |
2 |
9 |
=1+
2 |
9 |
=1
2 |
9 |
(3)
1 |
2 |
7 |
10 |
2 |
5 |
=
12 |
10 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
3 |
8 |
5 |
8 |
1 |
7 |
=1-
1 |
7 |
=
6 |
7 |
(2)
5 |
8 |
3 |
8 |
2 |
9 |
=
5 |
8 |
3 |
8 |
2 |
9 |
=1+
2 |
9 |
=1
2 |
9 |
(3)
1 |
2 |
7 |
10 |
2 |
5 |
=
12 |
10 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
5 |
8 |
1 |
7 |
=1-
1 |
7 |
=
6 |
7 |
(2)
5 |
8 |
3 |
8 |
2 |
9 |
=
5 |
8 |
3 |
8 |
2 |
9 |
=1+
2 |
9 |
=1
2 |
9 |
(3)
1 |
2 |
7 |
10 |
2 |
5 |
=
12 |
10 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
1 |
7 |
=1-
1 |
7 |
=
6 |
7 |
(2)
5 |
8 |
3 |
8 |
2 |
9 |
=
5 |
8 |
3 |
8 |
2 |
9 |
=1+
2 |
9 |
=1
2 |
9 |
(3)
1 |
2 |
7 |
10 |
2 |
5 |
=
12 |
10 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
1 |
7 |
=
6 |
7 |
(2)
5 |
8 |
3 |
8 |
2 |
9 |
=
5 |
8 |
3 |
8 |
2 |
9 |
=1+
2 |
9 |
=1
2 |
9 |
(3)
1 |
2 |
7 |
10 |
2 |
5 |
=
12 |
10 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
6 |
7 |
(2)
5 |
8 |
3 |
8 |
2 |
9 |
=
5 |
8 |
3 |
8 |
2 |
9 |
=1+
2 |
9 |
=1
2 |
9 |
(3)
1 |
2 |
7 |
10 |
2 |
5 |
=
12 |
10 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
5 |
8 |
3 |
8 |
2 |
9 |
=
5 |
8 |
3 |
8 |
2 |
9 |
=1+
2 |
9 |
=1
2 |
9 |
(3)
1 |
2 |
7 |
10 |
2 |
5 |
=
12 |
10 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
3 |
8 |
2 |
9 |
=
5 |
8 |
3 |
8 |
2 |
9 |
=1+
2 |
9 |
=1
2 |
9 |
(3)
1 |
2 |
7 |
10 |
2 |
5 |
=
12 |
10 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
2 |
9 |
=
5 |
8 |
3 |
8 |
2 |
9 |
=1+
2 |
9 |
=1
2 |
9 |
(3)
1 |
2 |
7 |
10 |
2 |
5 |
=
12 |
10 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
5 |
8 |
3 |
8 |
2 |
9 |
=1+
2 |
9 |
=1
2 |
9 |
(3)
1 |
2 |
7 |
10 |
2 |
5 |
=
12 |
10 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
3 |
8 |
2 |
9 |
=1+
2 |
9 |
=1
2 |
9 |
(3)
1 |
2 |
7 |
10 |
2 |
5 |
=
12 |
10 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
2 |
9 |
=1+
2 |
9 |
=1
2 |
9 |
(3)
1 |
2 |
7 |
10 |
2 |
5 |
=
12 |
10 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
2 |
9 |
=1
2 |
9 |
(3)
1 |
2 |
7 |
10 |
2 |
5 |
=
12 |
10 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
2 |
9 |
(3)
1 |
2 |
7 |
10 |
2 |
5 |
=
12 |
10 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
1 |
2 |
7 |
10 |
2 |
5 |
=
12 |
10 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
7 |
10 |
2 |
5 |
=
12 |
10 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
2 |
5 |
=
12 |
10 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
12 |
10 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
2 |
5 |
=
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
8 |
5 |
(4)5
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
2 |
3 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
3 |
10 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
1 |
3 |
=(5
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
2 |
3 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
1 |
3 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
3 |
10 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
7 |
10 |
=9+9
=18;
(5)
7 |
9 |
7 |
9 |
作业帮用户
2017-11-12
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作业帮用户作业帮用户
2017-11-122017-11-12
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- 问题解析
- (1)可根据加法交律计算.
(2)可根据加法结合律计算.
(3)可通分后按从左到右的顺序计算.
(4)可根据加法交换律与结合律计算.
(5)(6)先算括号中的加法,再算减法.
(7)(8)可根据一个数减几个数,等于用这个数减去这几个数的和的减法性质计算.
(2)可根据加法结合律计算.
(3)可通分后按从左到右的顺序计算.
(4)可根据加法交换律与结合律计算.
(5)(6)先算括号中的加法,再算减法.
(7)(8)可根据一个数减几个数,等于用这个数减去这几个数的和的减法性质计算.
(2)可根据加法结合律计算.
(3)可通分后按从左到右的顺序计算.
(4)可根据加法交换律与结合律计算.
(5)(6)先算括号中的加法,再算减法.
(7)(8)可根据一个数减几个数,等于用这个数减去这几个数的和的减法性质计算.
- 名师点评
-
- 本题考点:
- 分数的四则混合运算.
-
- 考点点评:
- 完成本题要注意分析式中数据的特点,然后运用合适的方法计算.
- 本题考点:
- 分数的四则混合运算.
- 本题考点:
- 分数的四则混合运算.
- 考点点评:
- 完成本题要注意分析式中数据的特点,然后运用合适的方法计算.
- 考点点评:
- 完成本题要注意分析式中数据的特点,然后运用合适的方法计算.
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