题目内容
|
35÷(
|
|
|
分析:(1)先算乘法,再算减法;
(2)先算小括号里面的除法,再算括号外的除法;
(3)运用乘法分配律简算;
(4)同时运算乘法和除法,再算加法.
(2)先算小括号里面的除法,再算括号外的除法;
(3)运用乘法分配律简算;
(4)同时运算乘法和除法,再算加法.
解答:解:(1)
-
×
,
=
-
,
=
;
(2)35÷(
÷
),
=35÷
,
=
;
(3)
×5-
×5,
=(
-
)×5,
=1×5,
=5;
(4)
×
+
÷
,
=
+
,
=
.
| 5 |
| 6 |
| 7 |
| 10 |
| 2 |
| 7 |
=
| 5 |
| 6 |
| 1 |
| 5 |
=
| 19 |
| 30 |
(2)35÷(
| 6 |
| 5 |
| 3 |
| 7 |
=35÷
| 14 |
| 5 |
=
| 25 |
| 2 |
(3)
| 11 |
| 8 |
| 3 |
| 8 |
=(
| 11 |
| 8 |
| 3 |
| 8 |
=1×5,
=5;
(4)
| 4 |
| 7 |
| 1 |
| 8 |
| 3 |
| 10 |
| 2 |
| 5 |
=
| 1 |
| 14 |
| 3 |
| 4 |
=
| 23 |
| 28 |
点评:此题主要考查分数的四则混合运算的运算顺序,以及应用运算定律进行简便计算的能力.
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