题目内容
计算下列各题:(每小题4分,共20分)
(1) 33+(-32)+7-(-3)
(2)(
+
-
)×(-12)
(3)-|-32|÷3×(-
)-(-2)3
(4)x2+3x2+x2-3x2
(5) 2(a2b-2ab2+c)-(2c+3a2b-ab2)
(1) 33+(-32)+7-(-3)
(2)(
5 |
12 |
2 |
3 |
3 |
4 |
(3)-|-32|÷3×(-
1 |
3 |
(4)x2+3x2+x2-3x2
(5) 2(a2b-2ab2+c)-(2c+3a2b-ab2)
(1)原式=33-32+7+3
=11;
(2)原式=
×(-12)+
×(-12)-
×(-12)
=-5-8+9
=-4;
(3)原式=-9÷3×(-
)-(-8)
=1+8
=9;
(4)原式=(1+3+1-3)x2
=2x2;
(5)原式=2a2b-4ab2+2c-2c-3a2b+ab2
=-a2b-3ab2.
=11;
(2)原式=
5 |
12 |
2 |
3 |
3 |
4 |
=-5-8+9
=-4;
(3)原式=-9÷3×(-
1 |
3 |
=1+8
=9;
(4)原式=(1+3+1-3)x2
=2x2;
(5)原式=2a2b-4ab2+2c-2c-3a2b+ab2
=-a2b-3ab2.
练习册系列答案
相关题目