题目内容
脱式计算
| 28×(46-37) | 56+56×9 | 76+24×5 | 213×3-39. |
(1)28×(46-37),
=28×9,
=252;
(2)56+56×9,
=56×(1+9),
=56×10,
=560;
(3)76+24×5,
=76+120,
=196;
(4)213×3-39,
=639-39,
=600.
=28×9,
=252;
(2)56+56×9,
=56×(1+9),
=56×10,
=560;
(3)76+24×5,
=76+120,
=196;
(4)213×3-39,
=639-39,
=600.
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