问题
解答题
脱式计算
|
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.
脱式计算
|
(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.