题目内容
怎样简单怎样算.
+(
-
)
+
+
+
-
-
5.56-
+4.44-
.
| 5 |
| 9 |
| 3 |
| 4 |
| 1 |
| 2 |
| 9 |
| 7 |
| 1 |
| 8 |
| 3 |
| 8 |
| 5 |
| 7 |
| 10 |
| 3 |
| 3 |
| 10 |
| 7 |
| 10 |
5.56-
| 3 |
| 7 |
| 4 |
| 7 |
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)运用加法交换律和结合律即可解答
(3)运用减法性质解答,
(4)运用加法交换律和减法性质解答,
(2)运用加法交换律和结合律即可解答
(3)运用减法性质解答,
(4)运用加法交换律和减法性质解答,
解答:
解:(1)
+(
-
)
=
+
=
;
(2)
+
+
+
=(
+
)+(
+
)
=2+
=2
;
(3)
-
-
=
-(
+
)
=
-1
=2
;
(4)5.56-
+4.44-
=(5.56+4.44)-(
+
)
=10-1
=9.
| 5 |
| 9 |
| 3 |
| 4 |
| 1 |
| 2 |
=
| 5 |
| 9 |
| 1 |
| 4 |
=
| 29 |
| 36 |
(2)
| 9 |
| 7 |
| 1 |
| 8 |
| 3 |
| 8 |
| 5 |
| 7 |
=(
| 9 |
| 7 |
| 5 |
| 7 |
| 1 |
| 8 |
| 3 |
| 8 |
=2+
| 1 |
| 2 |
=2
| 1 |
| 2 |
(3)
| 10 |
| 3 |
| 3 |
| 10 |
| 7 |
| 10 |
=
| 10 |
| 3 |
| 3 |
| 10 |
| 7 |
| 10 |
=
| 10 |
| 3 |
=2
| 1 |
| 3 |
(4)5.56-
| 3 |
| 7 |
| 4 |
| 7 |
=(5.56+4.44)-(
| 3 |
| 7 |
| 4 |
| 7 |
=10-1
=9.
点评:(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,是本题考查知识点.
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