题目内容
下面各题怎样简便就怎样算.
| 46.7-15.03-4.97 | 12.8-3.68÷2.3 | (
| |||||||
85×0.75+
|
|
(1)46.7-15.03-4.97,
=46.7-(15.03+4.97),
=46.7-20,
=26.7;
(2)12.8-3.68÷2.3,
=12.8-1.6,
=11.2;
(3)(
-
)÷(1+
),
=
÷
,
=
;
(4)85×0.75+
×15,
=(85+15)×
,
=100×
,
=75.
=46.7-(15.03+4.97),
=46.7-20,
=26.7;
(2)12.8-3.68÷2.3,
=12.8-1.6,
=11.2;
(3)(
| 11 |
| 12 |
| 3 |
| 4 |
| 1 |
| 2 |
=
| 1 |
| 6 |
| 3 |
| 2 |
=
| 1 |
| 9 |
(4)85×0.75+
| 3 |
| 4 |
=(85+15)×
| 3 |
| 4 |
=100×
| 3 |
| 4 |
=75.
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