题目内容
怎样简便就怎样计算.
| ①57.5-4.25-15.75 | ②125×
| ③
| ||||||||
| ④6760÷13+17×25 | ⑤99×56 | ⑥
|
①57.5-4.25-15.75,
=57.5-(4.25+15.75),
=57.5-20,
=37.5;
②125×
×8×
,
=(125×8)×(
×
),
=1000×
,
=500;
③
×16.31-2.31÷
,
=
×16.31-2.31×
,
=
×(16.31-2.31),
=
×14,
=10;
④6760÷13+17×25,
=520+425,
=945;
⑤99×56,
=(100-1)×56,
=100×56-1×56,
=5600-56,
=5544;
⑥
÷[(
-
)÷
],
=
÷[
÷
],
=
÷
,
=12.
=57.5-(4.25+15.75),
=57.5-20,
=37.5;
②125×
| 2 |
| 3 |
| 3 |
| 4 |
=(125×8)×(
| 2 |
| 3 |
| 3 |
| 4 |
=1000×
| 1 |
| 2 |
=500;
③
| 5 |
| 7 |
| 7 |
| 5 |
=
| 5 |
| 7 |
| 5 |
| 7 |
=
| 5 |
| 7 |
=
| 5 |
| 7 |
=10;
④6760÷13+17×25,
=520+425,
=945;
⑤99×56,
=(100-1)×56,
=100×56-1×56,
=5600-56,
=5544;
⑥
| 6 |
| 5 |
| 3 |
| 4 |
| 2 |
| 3 |
| 5 |
| 6 |
=
| 6 |
| 5 |
| 1 |
| 12 |
| 5 |
| 6 |
=
| 6 |
| 5 |
| 1 |
| 10 |
=12.
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