题目内容
计算:(1)-32-50÷(-5)2-1;
(2)-1-[2-(1-
| 1 |
| 3 |
(3)(-2)4÷(-2
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 6 |
(4)-32×2+(-2)3×3-48÷(-2).
分析:根据有理数的混合运算顺序,先算乘方,再算乘除,最后算加减;如果有括号,要先做括号内的运算.
解答:解:(1)原式=-9-50×
-1
=-9-2-1
=-12.
(2)原式=-1-[2-(1-
)]×[9-4]
=-1-
×5
=-6
.
(3)原式=16÷(-
)2+
×(-
)-
=16×
-
-
=
-
-
=1
.
(4)原式=-9×2+(-8)×3+24
=-18-24+24
=-18.
| 1 |
| 25 |
=-9-2-1
=-12.
(2)原式=-1-[2-(1-
| 1 |
| 6 |
=-1-
| 7 |
| 6 |
=-6
| 5 |
| 6 |
(3)原式=16÷(-
| 8 |
| 3 |
| 11 |
| 2 |
| 1 |
| 6 |
| 1 |
| 4 |
=16×
| 9 |
| 64 |
| 11 |
| 12 |
| 1 |
| 4 |
=
| 9 |
| 4 |
| 11 |
| 12 |
| 1 |
| 4 |
=1
| 1 |
| 12 |
(4)原式=-9×2+(-8)×3+24
=-18-24+24
=-18.
点评:本题主要考查有理数的混合运用,关键在于熟练运用有理数的混合运算规则对各个式子进行计算,属于常考的考点.
练习册系列答案
相关题目