题目内容
(2006?如皋市)(
-
÷2)×
.
| 3 |
| 4 |
| 1 |
| 10 |
| 5 |
| 14 |
分析:先算括号内的除法,再算括号内的减法,最后算括号外的乘法.
解答:解:(
-
÷2)×
,
=(
-
×
)×
,
=(
-
)×
,
=
×
,
=
.
| 3 |
| 4 |
| 1 |
| 10 |
| 5 |
| 14 |
=(
| 3 |
| 4 |
| 1 |
| 10 |
| 1 |
| 2 |
| 5 |
| 14 |
=(
| 3 |
| 4 |
| 1 |
| 20 |
| 5 |
| 14 |
=
| 7 |
| 10 |
| 5 |
| 14 |
=
| 1 |
| 4 |
点评:脱式计算,注意运算顺序与运算法则是解题的关键.
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