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选择适当的方法解答下列各题.(1)17.09-3.63-6.37+0.91(2)10÷〔83-(513÷526+25)〕(3)198÷43+202×34(4)78×〔1÷(710-720)〕(5)[1512-(1.75×57+134×27)]÷137.5%(6)4113×34+5114×
题目详情
选择适当的方法解答下列各题.
(1)17.09-3.63-6.37+0.91 (2)10÷〔
-(
÷
+
)〕 (1)17.09-3.63-6.37+0.91 (2)10÷〔
-(
÷
+
)〕
-(
÷
+
)〕
8 8 3 3
÷
+
)〕
5 5 13 13
+
)〕
5 5 26 26
)〕
2 2 5 5 (3)198÷
+202×
(4)
×〔1÷(
-
)〕 (3)198÷
+202×
+202×
4 4 3 3
3 3 4 4 (4)
×〔1÷(
-
)〕
×〔1÷(
-
)〕
7 7 8 8
-
)〕
7 7 10 10
)〕
7 7 20 20 (5)[15
-(1.75×
+1
×
)]÷137.5% (6)41
×
+51
×
+61
×
. (5)[15
-(1.75×
+1
×
)]÷137.5%
-(1.75×
+1
×
)]÷137.5%
1 1 2 2
+1
×
)]÷137.5%
5 5 7 7
×
)]÷137.5%
3 3 4 4
)]÷137.5%
2 2 7 7 (6)41
×
+51
×
+61
×
.
×
+51
×
+61
×
.
1 1 3 3
+51
×
+61
×
.
3 3 4 4
×
+61
×
.
1 1 4 4
+61
×
.
4 4 5 5
×
.
1 1 5 5
.
5 5 6 6
(1)17.09-3.63-6.37+0.91 | (2)10÷〔
| ||||||||||||||||||||
(3)198÷
| (4)
| ||||||||||||||||||||
(5)[15
| (6)41
|
(1)17.09-3.63-6.37+0.91 | (2)10÷〔
| ||||||||||||||||||||
(3)198÷
| (4)
| ||||||||||||||||||||
(5)[15
| (6)41
|
8 |
3 |
5 |
13 |
5 |
26 |
2 |
5 |
8 |
3 |
5 |
13 |
5 |
26 |
2 |
5 |
8 |
3 |
5 |
13 |
5 |
26 |
2 |
5 |
8 |
3 |
5 |
13 |
5 |
26 |
2 |
5 |
5 |
13 |
5 |
26 |
2 |
5 |
5 |
26 |
2 |
5 |
2 |
5 |
4 |
3 |
3 |
4 |
7 |
8 |
7 |
10 |
7 |
20 |
4 |
3 |
3 |
4 |
4 |
3 |
3 |
4 |
4 |
3 |
3 |
4 |
3 |
4 |
7 |
8 |
7 |
10 |
7 |
20 |
7 |
8 |
7 |
10 |
7 |
20 |
7 |
8 |
7 |
10 |
7 |
20 |
7 |
10 |
7 |
20 |
7 |
20 |
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
1 |
3 |
3 |
4 |
1 |
4 |
4 |
5 |
1 |
5 |
5 |
6 |
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
5 |
7 |
3 |
4 |
2 |
7 |
3 |
4 |
2 |
7 |
2 |
7 |
1 |
3 |
3 |
4 |
1 |
4 |
4 |
5 |
1 |
5 |
5 |
6 |
1 |
3 |
3 |
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1 |
4 |
4 |
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1 |
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1 |
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3 |
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1 |
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4 |
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1 |
5 |
5 |
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3 |
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1 |
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4 |
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1 |
5 |
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6 |
1 |
4 |
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1 |
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1 |
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6 |
▼优质解答
答案和解析
(1)17.09-3.63-6.37+0.91
=(17.09+0.91)-(3.63+6.37)
=18-10
=8;
(2)10÷[
-(
÷
+
)]
=10÷[
-(2+
)]
=10÷[
-2
]
=10÷
=37
;
(3)198÷
+202×
=198×
+202×
=(198+202)×
=400×
=300;
(4)
×[1÷(
-
)]
=
×[1÷
]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
8 8 83 3 3-(
÷
+
)]
=10÷[
-(2+
)]
=10÷[
-2
]
=10÷
=37
;
(3)198÷
+202×
=198×
+202×
=(198+202)×
=400×
=300;
(4)
×[1÷(
-
)]
=
×[1÷
]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
5 5 513 13 13÷
+
)]
=10÷[
-(2+
)]
=10÷[
-2
]
=10÷
=37
;
(3)198÷
+202×
=198×
+202×
=(198+202)×
=400×
=300;
(4)
×[1÷(
-
)]
=
×[1÷
]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
5 5 526 26 26+
)]
=10÷[
-(2+
)]
=10÷[
-2
]
=10÷
=37
;
(3)198÷
+202×
=198×
+202×
=(198+202)×
=400×
=300;
(4)
×[1÷(
-
)]
=
×[1÷
]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
2 2 25 5 5)]
=10÷[
-(2+
)]
=10÷[
-2
]
=10÷
=37
;
(3)198÷
+202×
=198×
+202×
=(198+202)×
=400×
=300;
(4)
×[1÷(
-
)]
=
×[1÷
]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
8 8 83 3 3-(2+
)]
=10÷[
-2
]
=10÷
=37
;
(3)198÷
+202×
=198×
+202×
=(198+202)×
=400×
=300;
(4)
×[1÷(
-
)]
=
×[1÷
]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
2 2 25 5 5)]
=10÷[
-2
]
=10÷
=37
;
(3)198÷
+202×
=198×
+202×
=(198+202)×
=400×
=300;
(4)
×[1÷(
-
)]
=
×[1÷
]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
8 8 83 3 3-2
]
=10÷
=37
;
(3)198÷
+202×
=198×
+202×
=(198+202)×
=400×
=300;
(4)
×[1÷(
-
)]
=
×[1÷
]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
2 2 25 5 5]
=10÷
=37
;
(3)198÷
+202×
=198×
+202×
=(198+202)×
=400×
=300;
(4)
×[1÷(
-
)]
=
×[1÷
]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
4 4 415 15 15
=37
;
(3)198÷
+202×
=198×
+202×
=(198+202)×
=400×
=300;
(4)
×[1÷(
-
)]
=
×[1÷
]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
1 1 12 2 2;
(3)198÷
+202×
=198×
+202×
=(198+202)×
=400×
=300;
(4)
×[1÷(
-
)]
=
×[1÷
]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
4 4 43 3 3+202×
=198×
+202×
=(198+202)×
=400×
=300;
(4)
×[1÷(
-
)]
=
×[1÷
]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
3 3 34 4 4
=198×
+202×
=(198+202)×
=400×
=300;
(4)
×[1÷(
-
)]
=
×[1÷
]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
3 3 34 4 4+202×
=(198+202)×
=400×
=300;
(4)
×[1÷(
-
)]
=
×[1÷
]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
3 3 34 4 4
=(198+202)×
=400×
=300;
(4)
×[1÷(
-
)]
=
×[1÷
]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
3 3 34 4 4
=400×
=300;
(4)
×[1÷(
-
)]
=
×[1÷
]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
3 3 34 4 4
=300;
(4)
×[1÷(
-
)]
=
×[1÷
]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
7 7 78 8 8×[1÷(
-
)]
=
×[1÷
]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
7 7 710 10 10-
)]
=
×[1÷
]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
7 7 720 20 20)]
=
×[1÷
]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
7 7 78 8 8×[1÷
]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
7 7 720 20 20]
=
×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
7 7 78 8 8×
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
20 20 207 7 7
=
;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
5 5 52 2 2;
(5)[15
-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
1 1 12 2 2-(1.75×
+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
5 5 57 7 7+1
×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
3 3 34 4 4×
)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
2 2 27 7 7)]÷137.5%
=[15
-(1.25+0.5)]÷137.5%
=[15
1 1 12 2 2-(1.25+0.5)]÷137.5%
=[15
举报
问题解析 问题解析
(1)根据减法的性质和加法交换律和结合律进行简算;
(2)先算小括号里面的除法,再算加法,再算减法,最后算括号外面的除法;
(3)根据乘法分配律进行简算;
(4)先算减法,再算除法,最后算乘法;
(5)先算小括号里面的乘法,再算加法,再算减法,最后算除法;
(6)根据乘法分配律进行简算. (1)根据减法的性质和加法交换律和结合律进行简算;
(2)先算小括号里面的除法,再算加法,再算减法,最后算括号外面的除法;
(3)根据乘法分配律进行简算;
(4)先算减法,再算除法,最后算乘法;
(5)先算小括号里面的乘法,再算加法,再算减法,最后算除法;
(6)根据乘法分配律进行简算.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;小数四则混合运算. 分数的四则混合运算;小数四则混合运算.
考点点评: 考点点评:
考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算定律简便计算. 考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算定律简便计算.
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=(17.09+0.91)-(3.63+6.37)
=18-10
=8;
(2)10÷[
8 |
3 |
5 |
13 |
5 |
26 |
2 |
5 |
=10÷[
8 |
3 |
2 |
5 |
=10÷[
8 |
3 |
2 |
5 |
=10÷
4 |
15 |
=37
1 |
2 |
(3)198÷
4 |
3 |
3 |
4 |
=198×
3 |
4 |
3 |
4 |
=(198+202)×
3 |
4 |
=400×
3 |
4 |
=300;
(4)
7 |
8 |
7 |
10 |
7 |
20 |
=
7 |
8 |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
8 |
3 |
5 |
13 |
5 |
26 |
2 |
5 |
=10÷[
8 |
3 |
2 |
5 |
=10÷[
8 |
3 |
2 |
5 |
=10÷
4 |
15 |
=37
1 |
2 |
(3)198÷
4 |
3 |
3 |
4 |
=198×
3 |
4 |
3 |
4 |
=(198+202)×
3 |
4 |
=400×
3 |
4 |
=300;
(4)
7 |
8 |
7 |
10 |
7 |
20 |
=
7 |
8 |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
5 |
13 |
5 |
26 |
2 |
5 |
=10÷[
8 |
3 |
2 |
5 |
=10÷[
8 |
3 |
2 |
5 |
=10÷
4 |
15 |
=37
1 |
2 |
(3)198÷
4 |
3 |
3 |
4 |
=198×
3 |
4 |
3 |
4 |
=(198+202)×
3 |
4 |
=400×
3 |
4 |
=300;
(4)
7 |
8 |
7 |
10 |
7 |
20 |
=
7 |
8 |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
5 |
26 |
2 |
5 |
=10÷[
8 |
3 |
2 |
5 |
=10÷[
8 |
3 |
2 |
5 |
=10÷
4 |
15 |
=37
1 |
2 |
(3)198÷
4 |
3 |
3 |
4 |
=198×
3 |
4 |
3 |
4 |
=(198+202)×
3 |
4 |
=400×
3 |
4 |
=300;
(4)
7 |
8 |
7 |
10 |
7 |
20 |
=
7 |
8 |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
2 |
5 |
=10÷[
8 |
3 |
2 |
5 |
=10÷[
8 |
3 |
2 |
5 |
=10÷
4 |
15 |
=37
1 |
2 |
(3)198÷
4 |
3 |
3 |
4 |
=198×
3 |
4 |
3 |
4 |
=(198+202)×
3 |
4 |
=400×
3 |
4 |
=300;
(4)
7 |
8 |
7 |
10 |
7 |
20 |
=
7 |
8 |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
8 |
3 |
2 |
5 |
=10÷[
8 |
3 |
2 |
5 |
=10÷
4 |
15 |
=37
1 |
2 |
(3)198÷
4 |
3 |
3 |
4 |
=198×
3 |
4 |
3 |
4 |
=(198+202)×
3 |
4 |
=400×
3 |
4 |
=300;
(4)
7 |
8 |
7 |
10 |
7 |
20 |
=
7 |
8 |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
2 |
5 |
=10÷[
8 |
3 |
2 |
5 |
=10÷
4 |
15 |
=37
1 |
2 |
(3)198÷
4 |
3 |
3 |
4 |
=198×
3 |
4 |
3 |
4 |
=(198+202)×
3 |
4 |
=400×
3 |
4 |
=300;
(4)
7 |
8 |
7 |
10 |
7 |
20 |
=
7 |
8 |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
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![]()
![]() ![]() |
8 |
3 |
2 |
5 |
=10÷
4 |
15 |
=37
1 |
2 |
(3)198÷
4 |
3 |
3 |
4 |
=198×
3 |
4 |
3 |
4 |
=(198+202)×
3 |
4 |
=400×
3 |
4 |
=300;
(4)
7 |
8 |
7 |
10 |
7 |
20 |
=
7 |
8 |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
2 |
5 |
=10÷
4 |
15 |
=37
1 |
2 |
(3)198÷
4 |
3 |
3 |
4 |
=198×
3 |
4 |
3 |
4 |
=(198+202)×
3 |
4 |
=400×
3 |
4 |
=300;
(4)
7 |
8 |
7 |
10 |
7 |
20 |
=
7 |
8 |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
4 |
15 |
=37
1 |
2 |
(3)198÷
4 |
3 |
3 |
4 |
=198×
3 |
4 |
3 |
4 |
=(198+202)×
3 |
4 |
=400×
3 |
4 |
=300;
(4)
7 |
8 |
7 |
10 |
7 |
20 |
=
7 |
8 |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
1 |
2 |
(3)198÷
4 |
3 |
3 |
4 |
=198×
3 |
4 |
3 |
4 |
=(198+202)×
3 |
4 |
=400×
3 |
4 |
=300;
(4)
7 |
8 |
7 |
10 |
7 |
20 |
=
7 |
8 |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
4 |
3 |
3 |
4 |
=198×
3 |
4 |
3 |
4 |
=(198+202)×
3 |
4 |
=400×
3 |
4 |
=300;
(4)
7 |
8 |
7 |
10 |
7 |
20 |
=
7 |
8 |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
3 |
4 |
=198×
3 |
4 |
3 |
4 |
=(198+202)×
3 |
4 |
=400×
3 |
4 |
=300;
(4)
7 |
8 |
7 |
10 |
7 |
20 |
=
7 |
8 |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
3 |
4 |
3 |
4 |
=(198+202)×
3 |
4 |
=400×
3 |
4 |
=300;
(4)
7 |
8 |
7 |
10 |
7 |
20 |
=
7 |
8 |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
3 |
4 |
=(198+202)×
3 |
4 |
=400×
3 |
4 |
=300;
(4)
7 |
8 |
7 |
10 |
7 |
20 |
=
7 |
8 |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
3 |
4 |
=400×
3 |
4 |
=300;
(4)
7 |
8 |
7 |
10 |
7 |
20 |
=
7 |
8 |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
3 |
4 |
=300;
(4)
7 |
8 |
7 |
10 |
7 |
20 |
=
7 |
8 |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
7 |
8 |
7 |
10 |
7 |
20 |
=
7 |
8 |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
7 |
10 |
7 |
20 |
=
7 |
8 |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
7 |
20 |
=
7 |
8 |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
7 |
8 |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
7 |
20 |
=
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
7 |
8 |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
20 |
7 |
=
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
5 |
2 |
(5)[15
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
1 |
2 |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
5 |
7 |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
3 |
4 |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
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![]()
![]() ![]() |
2 |
7 |
=[15
1 |
2 |
=[15
作业帮用户
2016-11-21
举报
![]()
![]() ![]() |
1 |
2 |
=[15
作业帮用户
2016-11-21
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![]()
![]() ![]() |
作业帮用户
2016-11-21
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![]()
![]() ![]() |
作业帮用户
2016-11-21
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![](https://yy-s.zuoyebang.cc/static/question/widget/question/report/resource/icon_report_d51b383.png)
- 问题解析
- (1)根据减法的性质和加法交换律和结合律进行简算;
(2)先算小括号里面的除法,再算加法,再算减法,最后算括号外面的除法;
(3)根据乘法分配律进行简算;
(4)先算减法,再算除法,最后算乘法;
(5)先算小括号里面的乘法,再算加法,再算减法,最后算除法;
(6)根据乘法分配律进行简算.
- 名师点评
-
- 本题考点:
- 分数的四则混合运算;小数四则混合运算.
-
- 考点点评:
- 考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算定律简便计算.
![](https://img.zuoyebang.cc/zyb_2c0c717c464dca8ef4a230a9f98c53e9.jpg)
![](https://img.zuoyebang.cc/zyb_2c0c717c464dca8ef4a230a9f98c53e9.jpg)
作业帮用户
2016-11-21
举报
![](https://yy-s.zuoyebang.cc/static/question/widget/question/report/resource/icon_report_d51b383.png)
- 问题解析
- (1)根据减法的性质和加法交换律和结合律进行简算;
(2)先算小括号里面的除法,再算加法,再算减法,最后算括号外面的除法;
(3)根据乘法分配律进行简算;
(4)先算减法,再算除法,最后算乘法;
(5)先算小括号里面的乘法,再算加法,再算减法,最后算除法;
(6)根据乘法分配律进行简算.
- 名师点评
-
- 本题考点:
- 分数的四则混合运算;小数四则混合运算.
-
- 考点点评:
- 考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算定律简便计算.
![](https://img.zuoyebang.cc/zyb_2c0c717c464dca8ef4a230a9f98c53e9.jpg)
![](https://img.zuoyebang.cc/zyb_2c0c717c464dca8ef4a230a9f98c53e9.jpg)
作业帮用户
2016-11-21
举报
作业帮用户作业帮用户
2016-11-212016-11-21
举报
![](https://yy-s.zuoyebang.cc/static/question/widget/question/report/resource/icon_report_d51b383.png)
![](https://yy-s.zuoyebang.cc/static/question/widget/question/report/resource/icon_report_d51b383.png)
![](https://yy-s.zuoyebang.cc/static/question/widget/question/report/resource/icon_report_d51b383.png)
- 问题解析
- (1)根据减法的性质和加法交换律和结合律进行简算;
(2)先算小括号里面的除法,再算加法,再算减法,最后算括号外面的除法;
(3)根据乘法分配律进行简算;
(4)先算减法,再算除法,最后算乘法;
(5)先算小括号里面的乘法,再算加法,再算减法,最后算除法;
(6)根据乘法分配律进行简算.
(2)先算小括号里面的除法,再算加法,再算减法,最后算括号外面的除法;
(3)根据乘法分配律进行简算;
(4)先算减法,再算除法,最后算乘法;
(5)先算小括号里面的乘法,再算加法,再算减法,最后算除法;
(6)根据乘法分配律进行简算.
(2)先算小括号里面的除法,再算加法,再算减法,最后算括号外面的除法;
(3)根据乘法分配律进行简算;
(4)先算减法,再算除法,最后算乘法;
(5)先算小括号里面的乘法,再算加法,再算减法,最后算除法;
(6)根据乘法分配律进行简算.
- 名师点评
-
- 本题考点:
- 分数的四则混合运算;小数四则混合运算.
-
- 考点点评:
- 考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算定律简便计算.
- 本题考点:
- 分数的四则混合运算;小数四则混合运算.
- 本题考点:
- 分数的四则混合运算;小数四则混合运算.
- 考点点评:
- 考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算定律简便计算.
- 考点点评:
- 考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算定律简便计算.
![我是二维码](https://yy-s.zuoyebang.cc/static/question/widget/question/fixed-guide/resource/images/qrcode_3bd65ae.png)
![我是二维码](https://yy-s.zuoyebang.cc/static/question/widget/question/fixed-guide/resource/images/qrcode_3bd65ae.png)
![](https://img.zuoyebang.cc/zyb_2c0c717c464dca8ef4a230a9f98c53e9.jpg)
![](https://img.zuoyebang.cc/zyb_2c0c717c464dca8ef4a230a9f98c53e9.jpg)
![](https://img.zuoyebang.cc/zyb_2c0c717c464dca8ef4a230a9f98c53e9.jpg)
![](https://img.zuoyebang.cc/zyb_2c0c717c464dca8ef4a230a9f98c53e9.jpg)
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