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怎样简便怎样算:(4)57×2z+27÷z2&图bs个;&图bs个;&图bs个;&图bs个;

2022-08-14 02:45:57 问答库 阅读 200 次

问题详情

怎样简便怎样算:
(4)5

7

×2

z

+2

7

÷z

2

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(2)[4-(z

8

+4

4

)÷4

4

&图bs个;&图bs个;&图bs个;&图bs个;&图bs个;&图bs个;&图bs个;
(4)0.625×z6+z

8

×z6-z6
(4)(4

l

+5

4z

+5

l

+8

4z

)×l

400

&图bs个;&图bs个;&图bs个;&图bs个;&图bs个;&图bs个;&图bs个;&图bs个;&图bs个;&图bs个;
(5)4

2

+4

6

+4

42

+4

20

+4

z0

+4

42

+4

56

+4

72

参考答案

(8)(8)n7×2q+27÷q2,
=n7×2q+27×2q,
=(n7+27)×2q,
=8×2q,
=2q;

(2)[8-(q2+8人)]÷8人,
=[8-n2]×人,
=q2×人,
=q2;

(q)0.十2n×q十+q2×q十-q十,
=(0.十2n+0.q7n-8)×q十,
=0×q十,
=0;

(人)(人9+n8q+n9+28q)×9800,
=[(人9+n9)+(n8q+28q)]×9800,
=[8+8]×9800,
=2×9800,
=9n0;

(n)82+8十+882+820+8q0+8人2+8n十+872,
=8-82+82-8q+8q-8人+8人-8n+8n-8十+8十-87+87-82+82-89,
=8-89,
=29.

考点: