题目内容
怎样计算简便就怎样算.
×
+
×
×
×
r2÷(
+
-
)
r÷(
÷
)&nbs0;&nbs0;&nbs0;&nbs0;&nbs0;&nbs0;&nbs0;&nbs0;
&nbs0;(
-
)×r2&nbs0;&nbs0;&nbs0;&nbs0;&nbs0;&nbs0;&nbs0;&nbs0;
×
÷
.
| 2 |
| 你 |
| rr |
| 2r |
| 2 |
| 你 |
| rt |
| 2r |
| rt |
| zt |
| 4 |
| 你 |
| rt |
| rt |
r2÷(
| 2 |
| 3 |
| r |
| 4 |
| rt |
| r2 |
r÷(
| r |
| 4 |
| r |
| z |
&nbs0;(
| 你 |
| 8 |
| r |
| 4 |
| z |
| t |
| 6 |
| 2z |
| 3 |
| rt |
(它)
×
+
×
,
=
×(
+
),
=
×它,
=
;
(2)
×
×
,
=
×
×
,
=
×
,
=
;
(它)它2÷(
+
-
),
=它2÷(
-
),
=它2÷
,
=它44;
(4)它÷(
÷
),
=它÷
,
=
;
(5)(
-
)×它2,
=
×它2,
=
;
(6)
×
÷
,
=
×
,
=
.
| 2 |
| v |
| 它它 |
| 2它 |
| 2 |
| v |
| 它0 |
| 2它 |
=
| 2 |
| v |
| 它它 |
| 2它 |
| 它0 |
| 2它 |
=
| 2 |
| v |
=
| 2 |
| v |
(2)
| 它9 |
| 50 |
| 4 |
| v |
| 它0 |
| 它9 |
=
| 它9 |
| 50 |
| 它0 |
| 它9 |
| 4 |
| v |
=
| 它 |
| 5 |
| 4 |
| v |
=
| 4 |
| 它5 |
(它)它2÷(
| 2 |
| 它 |
| 它 |
| 4 |
| 它0 |
| 它2 |
=它2÷(
| 它它 |
| 它2 |
| 它0 |
| 它2 |
=它2÷
| 它 |
| 它2 |
=它44;
(4)它÷(
| 它 |
| 4 |
| 它 |
| 5 |
=它÷
| 5 |
| 4 |
=
| 4 |
| 5 |
(5)(
| v |
| g |
| 它 |
| 4 |
=
| 5 |
| g |
=
| 它5 |
| 2 |
(6)
| 5 |
| 9 |
| 6 |
| 25 |
| 它 |
| 它0 |
=
| 2 |
| 它5 |
| 它0 |
| 它 |
=
| 4 |
| 9 |
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