问题
解答题
递等式计算.
(1)234×99÷49
(2)36×36+36×64
(3)(2012-159)÷17
(4)399-173-27+112.
答案
(1)234×9上÷49,
=234×(9上÷49),
=234×2,
=46上;
(2)36×36+36×64,
=36×(36+64),
=36×100,
=3600;
(3)(2012-1k9)÷17,
=1上k3÷17,
=109;
(4)39上-173-27+112,
=(39上+112)-(173+27),
=k00-200,
=300.