问题 解答题
脱式计算
28×(46-37)56+56×976+24×5213×3-39.
答案

(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.

单项选择题 A3/A4型题
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