题目内容
简便运算
6-
|
|
|
|
考点:分数的简便计算
专题:运算定律及简算
分析:(1)运用减法的性质简算;
(2)运用加法交换律与结合律简算;
(3)运用加法的相知以及加法交换律和结合律简算;
(4)从左往右依次计算.
(2)运用加法交换律与结合律简算;
(3)运用加法的相知以及加法交换律和结合律简算;
(4)从左往右依次计算.
解答:
解:(1)6-
-
=6-(
-
)
=6-1
=5
(2)
-
+
-
=(
+
)-(
+
)
=1-1
=0
(3)
-(
-
)
=
+
-
=1-
=
(4)
+
-
=
-
=
3 |
11 |
8 |
11 |
=6-(
3 |
11 |
8 |
11 |
=6-1
=5
(2)
11 |
14 |
3 |
5 |
3 |
14 |
2 |
5 |
=(
11 |
14 |
3 |
14 |
3 |
5 |
2 |
5 |
=1-1
=0
(3)
3 |
4 |
2 |
5 |
1 |
4 |
=
3 |
4 |
1 |
4 |
2 |
5 |
=1-
2 |
5 |
=
3 |
5 |
(4)
7 |
9 |
1 |
9 |
1 |
3 |
=
8 |
9 |
1 |
3 |
=
5 |
9 |
点评:此题主要考查分数的四则混合运算的运算顺序和应用运算定律进行简便计算.
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