计算:(1)(-2a)3+(a4)2÷(-a)5; (2)(?2a2y)3?(?25x3y2)2÷(?3225a5x4y...
计算:(1)(-2a)3+(a4)2÷(-a)5;(2)(?2a2y)3?(?25x3y2)2÷(?3225a5x4y3)(3)(22012?21911)0?(?14)?...
计算:(1)(-2a)3+(a4)2÷(-a)5; (2)(?2a2y)3?(?25x3y2)2÷(?3225a5x4y3)(3)(22012?21911)0?(?14)?2+(?0.125)9×810 (4)98×272÷(-3)18(5)(x+y)6÷(x+y)5?(y+x)(6)(n-m)3?(m-n)2-(m-n)5.
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(1)(-2a)3+(a4)2÷(-a)5
=-8a3+a8÷(-a5)
=-8a3-a3
=-9a3;
(2)(-2a2y)3?(-
x3y2)2÷(-
a5x4y3)
=-8a6y3?
x6y4÷(-
a5x4y3)
=-
a6x6y7÷(-
a5x4y3)
=ax2y4;
(3)(22012-21911)0-(-
)-2+(-0.125)9×810
=1-16+(-0.125×8)9×8
=1-16-8
=-23;
(4)98×272÷(-3)18
=(32)8×(33)2÷318
=316×36÷318
=34
=81;
(5)(x+y)6÷(x+y)5?(y+x)
=(x+y)?(y+x)
=(x+y)2
=x2+2xy+y2;
(6)(n-m)3?(m-n)2-(m-n)5
=-(m-n)3?(m-n)2-(m-n)5
=-(m-n)5-(m-n)5
=-2(m-n)5.
=-8a3+a8÷(-a5)
=-8a3-a3
=-9a3;
(2)(-2a2y)3?(-
2 |
5 |
32 |
25 |
=-8a6y3?
4 |
25 |
32 |
25 |
=-
32 |
25 |
32 |
25 |
=ax2y4;
(3)(22012-21911)0-(-
1 |
4 |
=1-16+(-0.125×8)9×8
=1-16-8
=-23;
(4)98×272÷(-3)18
=(32)8×(33)2÷318
=316×36÷318
=34
=81;
(5)(x+y)6÷(x+y)5?(y+x)
=(x+y)?(y+x)
=(x+y)2
=x2+2xy+y2;
(6)(n-m)3?(m-n)2-(m-n)5
=-(m-n)3?(m-n)2-(m-n)5
=-(m-n)5-(m-n)5
=-2(m-n)5.
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