题目内容
脱式计算
| 48×(46-37) | 36×3×8 | 213×3-39 | 685+68×9. |
(1)48×(46-37),
=48×9,
=432;
(2)36×3×8,
=108×8,
=864;
(3)213×3-39,
=639-39,
=600;
(4)685+68×9,
=685+612,
=1297.
=48×9,
=432;
(2)36×3×8,
=108×8,
=864;
(3)213×3-39,
=639-39,
=600;
(4)685+68×9,
=685+612,
=1297.
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