题目内容
| 计算下面各题. (520+138)÷(267-220) | [86-(45+17)]×25 | 156+18×42÷63. |
(1)(520+138)÷(267-220)
=658÷47
=14;
(2)[86-(45+17)]×25
=[86-62]×25
=24×25
=600;
(3)156+18×42÷63
=156+756÷63
=156+12
=168.
=658÷47
=14;
(2)[86-(45+17)]×25
=[86-62]×25
=24×25
=600;
(3)156+18×42÷63
=156+756÷63
=156+12
=168.
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