题目内容
24×(
-
)-[(5
-4.25)÷
].
| 3 |
| 8 |
| 1 |
| 6 |
| 1 |
| 4 |
| 5 |
| 8 |
分析:先算第二个小括号里面的减法,再算中括号里面的除法,然后运用乘法分配律计算第一个小括号和它前面的乘法,最后算减法.
解答:解:24×(
-
)-[(5
-4.25)÷
],
=24×(
-
)-[1÷
],
=24×(
-
)-
,
=24×
-24×
-
,
=9-4-
,
=5-
,
=
.
| 3 |
| 8 |
| 1 |
| 6 |
| 1 |
| 4 |
| 5 |
| 8 |
=24×(
| 3 |
| 8 |
| 1 |
| 6 |
| 5 |
| 8 |
=24×(
| 3 |
| 8 |
| 1 |
| 6 |
| 8 |
| 5 |
=24×
| 3 |
| 8 |
| 1 |
| 6 |
| 8 |
| 5 |
=9-4-
| 8 |
| 5 |
=5-
| 8 |
| 5 |
=
| 17 |
| 5 |
点评:本题计算的步骤较多,要注意计算的顺序,能用简算的运算要简算.
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