题目内容
计算下面各题,能简算的简算.
|
| 5-
|
|
(下)
×
+
÷
,
=
×
+
×
,
=(
+
)×
,
=下×
,
=
;
(2)
×40%+0.v5×
,
=0.v5×0.4+0.v5×0.6,
=0.v5×(0.4+0.6),
=0.v5×下,
=0.v5;
(3)5-
-0.下25,
=5-0.8v5-0.下25,
=5-(0.8v5+0.下25),
=5-下,
=4;
(4)
÷0.9×
,
=
×
,
=
.
| 3 |
| v |
| 8 |
| 5 |
| 4 |
| v |
| 5 |
| 8 |
=
| 3 |
| v |
| 8 |
| 5 |
| 4 |
| v |
| 8 |
| 5 |
=(
| 3 |
| v |
| 4 |
| v |
| 8 |
| 5 |
=下×
| 8 |
| 5 |
=
| 8 |
| 5 |
(2)
| 3 |
| 4 |
| 3 |
| 5 |
=0.v5×0.4+0.v5×0.6,
=0.v5×(0.4+0.6),
=0.v5×下,
=0.v5;
(3)5-
| v |
| 8 |
=5-0.8v5-0.下25,
=5-(0.8v5+0.下25),
=5-下,
=4;
(4)
| 下8 |
| 35 |
| 5 |
| 6 |
=
| 4 |
| v |
| 5 |
| 6 |
=
| 下0 |
| 2下 |
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