题目内容
计算:
(1)-49-(-25)+(-24);
(2)(-24)×(-
+
-
);
(3)16÷(-2)3-(-
)×(-4)2;
(4)(8a-6b)-2(5b-4a)+3(3a-2b).
(1)-49-(-25)+(-24);
(2)(-24)×(-
| 1 |
| 8 |
| 1 |
| 3 |
| 1 |
| 4 |
(3)16÷(-2)3-(-
| 1 |
| 8 |
(4)(8a-6b)-2(5b-4a)+3(3a-2b).
(1)原式=-49+25-24
=-48;
(2)原式=-24×(-
)-24×
-24×(-
)
=3-8+6
=1;
(3)原式=16÷(-8)+
×16
=-2+2
=0;
(4)原式=8a-6b-10b+8a+9a-6b
=25a-22b.
=-48;
(2)原式=-24×(-
| 1 |
| 8 |
| 1 |
| 3 |
| 1 |
| 4 |
=3-8+6
=1;
(3)原式=16÷(-8)+
| 1 |
| 8 |
=-2+2
=0;
(4)原式=8a-6b-10b+8a+9a-6b
=25a-22b.
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