题目内容
计算题:(1)-
| 2 |
| 3 |
| 7 |
| 4 |
| 7 |
| 8 |
(2)-14+[1
| 1 |
| 24 |
| 3 |
| 8 |
| 1 |
| 6 |
| 3 |
| 4 |
分析:(1)根据有理数混合运算的顺序计算求解;
(2)根据有理数混合运算的顺序,先算乘方再算乘除最后算加减,有括号的先算括号里面的.
(2)根据有理数混合运算的顺序,先算乘方再算乘除最后算加减,有括号的先算括号里面的.
解答:解:(1)-
×(-6)+
÷(-
)
=4+(-2)
=2;
(2)-14+[1
-(
+
-
)×24]÷5
=-1+[1
-
×24-
×24+
×24]÷5
=-1+[1
-9-4+18]÷5
=-1+
×
=-1+
=
.
| 2 |
| 3 |
| 7 |
| 4 |
| 7 |
| 8 |
=4+(-2)
=2;
(2)-14+[1
| 1 |
| 24 |
| 3 |
| 8 |
| 1 |
| 6 |
| 3 |
| 4 |
=-1+[1
| 1 |
| 24 |
| 3 |
| 8 |
| 1 |
| 6 |
| 3 |
| 4 |
=-1+[1
| 1 |
| 24 |
=-1+
| 145 |
| 24 |
| 1 |
| 5 |
=-1+
| 29 |
| 24 |
=
| 5 |
| 24 |
点评:本题主要考查有理数的混合运算,熟练掌握混合运算的顺序是解题的关键.
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