题目内容
下面各题怎样算简便就怎样算.
12÷(
|
|
| ||||||||||||||||||||||
(2-
|
1
|
(
|
考点:分数的四则混合运算
专题:运算顺序及法则
分析:(1)按照先算括号里面的,再算括号外面的顺序计算即可解答,
(2)(3)运用乘法分配律解答,
(4)按照先算括号里面的除法,再算括号里面的减法,最后算括号外面的顺序计算即可解答,
(5)运用减法性质即可解答,
(6)按照先同时计算括号里面的除法和乘法,再算括号里面的加法,最后算括号外面的除法顺序计算即可解答.
(2)(3)运用乘法分配律解答,
(4)按照先算括号里面的除法,再算括号里面的减法,最后算括号外面的顺序计算即可解答,
(5)运用减法性质即可解答,
(6)按照先同时计算括号里面的除法和乘法,再算括号里面的加法,最后算括号外面的除法顺序计算即可解答.
解答:
解:(1)12÷(
+
)
=12÷
=11
;
(2)
÷
+
×26
=(
+
)×26
=1×26
=26;
(3)
×(51+
)-
=
×51+
×
-
=27+
-
=27
-
=26
;
(4)(2-
÷
)÷
=(2-1
)÷
=
÷
=
;
(5)1
-
÷
-
=1
-(
+
)
=1
-
=1;
(6)(
×6+
÷
)÷
=(3+2
)÷
=5
÷
=59
.
| 1 |
| 3 |
| 3 |
| 4 |
=12÷
| 13 |
| 12 |
=11
| 1 |
| 13 |
(2)
| 5 |
| 9 |
| 1 |
| 26 |
| 4 |
| 9 |
=(
| 5 |
| 9 |
| 4 |
| 9 |
=1×26
=26;
(3)
| 9 |
| 17 |
| 17 |
| 27 |
| 17 |
| 27 |
=
| 9 |
| 17 |
| 9 |
| 17 |
| 17 |
| 27 |
| 17 |
| 27 |
=27+
| 1 |
| 3 |
| 17 |
| 27 |
=27
| 1 |
| 3 |
| 17 |
| 27 |
=26
| 8 |
| 27 |
(4)(2-
| 9 |
| 10 |
| 3 |
| 5 |
| 5 |
| 6 |
=(2-1
| 1 |
| 2 |
| 5 |
| 6 |
=
| 1 |
| 2 |
| 5 |
| 6 |
=
| 3 |
| 5 |
(5)1
| 6 |
| 7 |
| 1 |
| 3 |
| 7 |
| 12 |
| 2 |
| 7 |
=1
| 6 |
| 7 |
| 4 |
| 7 |
| 2 |
| 7 |
=1
| 6 |
| 7 |
| 6 |
| 7 |
=1;
(6)(
| 1 |
| 2 |
| 5 |
| 6 |
| 2 |
| 7 |
| 1 |
| 10 |
=(3+2
| 11 |
| 12 |
| 1 |
| 10 |
=5
| 11 |
| 12 |
| 1 |
| 10 |
=59
| 1 |
| 6 |
点评:本题考查知识点:(1)依据四则运算计算方法正确进行计算,(2)运用简便方法解决问题.
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