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递等式计算.(1)234×98÷49(2)36×36+36×64(3)(2012-159)÷17(4)398-173-27+112.

题目详情
递等式计算.
(1)234×98÷49
(2)36×36+36×64
(3)(2012-159)÷17
(4)398-173-27+112.
▼优质解答
答案和解析
(1)234×98÷49,
=234×(98÷49),
=234×2,
=468;

(2)36×36+36×64,
=36×(36+64),
=36×100,
=3600;

(3)(2012-159)÷17,
=1853÷17,
=109;

(4)398-173-27+112,
=(398+112)-(173+27),
=500-200,
=300.