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计算:(1)1528÷57(2)415÷8(3)213÷1415
展开全部
(1)
÷
,
=
×
,
=
;
(2)
÷8,
=
×
,
=
;
(3)2
÷
,
=
×
,
=
.
15 |
28 |
5 |
7 |
=
15 |
28 |
7 |
5 |
=
3 |
4 |
(2)
4 |
15 |
=
4 |
15 |
1 |
8 |
=
1 |
30 |
(3)2
1 |
3 |
14 |
15 |
=
7 |
3 |
15 |
14 |
=
5 |
2 |
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