题目内容
计算:
(1)(-8)-(-2)
(2)25×
+(-25)×
+25×(-
)
(3)-22÷
-[
-(1-
×
)]×12
(4) 3a-[5a-(2a-1)]
(1)(-8)-(-2)
(2)25×
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
(3)-22÷
| 4 |
| 3 |
| 1 |
| 22 |
| 1 |
| 2 |
| 1 |
| 3 |
(4) 3a-[5a-(2a-1)]
(1)原式=-8+2=-6;
(2)原式=25×(
-
-
)=25×0=0;
(3)原式=-4÷
-
×12+
×12=-3-3+10=4;
(4)原式=3a-3a-1=-1.
(2)原式=25×(
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
(3)原式=-4÷
| 4 |
| 3 |
| 1 |
| 4 |
| 5 |
| 6 |
(4)原式=3a-3a-1=-1.
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