题目内容
计算:
①(-8)+10+2+(-1)
②|-5
|×(
-
)×0.6÷(-1.75)
③(-10)3+[(-4)2-(1-32)×2]
④-32×(-
)2+(
+
+
)×(-24)
⑤a-(5a-3b)+(2b-a)
⑥5x2+[x2+(5x2-2x)]-2(x2-3x)
①(-8)+10+2+(-1)
②|-5
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 2 |
③(-10)3+[(-4)2-(1-32)×2]
④-32×(-
| 1 |
| 3 |
| 3 |
| 4 |
| 1 |
| 6 |
| 3 |
| 8 |
⑤a-(5a-3b)+(2b-a)
⑥5x2+[x2+(5x2-2x)]-2(x2-3x)
①原式=[(-8)+(-1)]+(10+2)=-9+12=3;
②原式=
×(-
)×
÷(-
)=
×(-
)×
×(-
)=
;
③原式=-1000+16-(-8)×2=-1000+16+16=-968;
④原式=-9×
+(-24)×
+(-24)×
+(-24)×
=-1-18-4-9=-32;
⑤原式=a-5a+3b+2b-a=5b-5a;
⑥原式=5x2+x2+5x2-2x-2x2+6x=9x2+4x.
②原式=
| 11 |
| 2 |
| 1 |
| 6 |
| 3 |
| 5 |
| 7 |
| 4 |
| 11 |
| 2 |
| 1 |
| 6 |
| 3 |
| 5 |
| 4 |
| 7 |
| 11 |
| 35 |
③原式=-1000+16-(-8)×2=-1000+16+16=-968;
④原式=-9×
| 1 |
| 9 |
| 3 |
| 4 |
| 1 |
| 6 |
| 3 |
| 8 |
⑤原式=a-5a+3b+2b-a=5b-5a;
⑥原式=5x2+x2+5x2-2x-2x2+6x=9x2+4x.
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