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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