题目内容
计算:
(1)-40-(-19)+(-24)
(2)(-24)×(-
+
-
)
(3)16÷(-2)3-(-
)×(-4)2
(4)(-2)2+(4-7)÷
-|-1|
(5)2a-5b-3a+b
(6)-2(2x2-xy)+4(x2+xy-1)
(7)(4a+3a2-3+3a3)-(-a+4a3)
(1)-40-(-19)+(-24)
(2)(-24)×(-
| 1 |
| 8 |
| 1 |
| 3 |
| 1 |
| 6 |
(3)16÷(-2)3-(-
| 1 |
| 8 |
(4)(-2)2+(4-7)÷
| 3 |
| 2 |
(5)2a-5b-3a+b
(6)-2(2x2-xy)+4(x2+xy-1)
(7)(4a+3a2-3+3a3)-(-a+4a3)
(1)原式=-40+19-24=-45;
(2)原式=-24×(-
)-24×
-24×(-
)=3-8+4=-1;
(3)原式=-2+2=0;
(4)原式=4+3×
-1=5;
(5)原式=-a-4b;
(6)原式=-4x2+2xy+4x2+4xy-4=6xy-4;
(7)原式=4a+3a2-3+3a3+a-4a3=-a3+3a2+5a-3;
(2)原式=-24×(-
| 1 |
| 8 |
| 1 |
| 3 |
| 1 |
| 6 |
(3)原式=-2+2=0;
(4)原式=4+3×
| 2 |
| 3 |
(5)原式=-a-4b;
(6)原式=-4x2+2xy+4x2+4xy-4=6xy-4;
(7)原式=4a+3a2-3+3a3+a-4a3=-a3+3a2+5a-3;
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