脱式计算 28×(46-37) 56+56×9 76+24×5 213×3-39.

2024-11-16 14:48:17
推荐回答(1个)
回答1:

(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.