题目内容
计算:
(1)(
)-1-|-
|+(3-π)0.
(2)(3-1x3y-2)-2•(x-3y2)-3.
(3)6x2yz÷(-2xy-2z-1).
(1)(
| 1 |
| 2 |
| 1 |
| 3 |
(2)(3-1x3y-2)-2•(x-3y2)-3.
(3)6x2yz÷(-2xy-2z-1).
(1)原式=2-
+1
=
;
(2)原式=(
)-2•(
)-3
=
•
=
;
(3)原式=6x2yz÷(
)-1
=6x2yz÷
=6x2yz•
=-3xy3z2.
| 1 |
| 3 |
=
| 8 |
| 3 |
(2)原式=(
| x3 |
| 3y2 |
| y2 |
| x3 |
=
| 9y4 |
| x6 |
| x9 |
| y6 |
=
| 9x3 |
| y2 |
(3)原式=6x2yz÷(
| -2x |
| y2 |
=6x2yz÷
| y2 |
| -2x |
=6x2yz•
| -2x |
| y2 |
=-3xy3z2.
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