题目内容
计算下面各题.(能简算的要简算).
(1)
×40%+
×60%
(2)
×
×80%
(1)
| 3 |
| 4 |
| 3 |
| 4 |
(2)
| 5 |
| 8 |
| 1 |
| 9 |
(1)
×40%+
×60%,
=
×(40%+60%),
=
×1,
=
;
(2)
×
×80%,
=
×
×
,
=
×
,
=
.
| 3 |
| 4 |
| 3 |
| 4 |
=
| 3 |
| 4 |
=
| 3 |
| 4 |
=
| 3 |
| 4 |
(2)
| 5 |
| 8 |
| 1 |
| 9 |
=
| 5 |
| 8 |
| 8 |
| 10 |
| 1 |
| 9 |
=
| 1 |
| 2 |
| 1 |
| 9 |
=
| 1 |
| 18 |
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