问题 解答题
脱式计算
(27+53)×7560+56×228×(46-37)
21+13×3354-78+12216×7×9.
答案

(1)(27+53)×7,

=80×7,

=560;

(2)560+56×2,

=560+112,

=672;

(3)28×(46-37),

=28×9,

=252;

(4)21+13×3,

=21+39,

=60;

(5)354-78+122,

=276+122,

=398;

(6)16×7×9,

=112×9,

=1008.

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