怎样简便就怎样算; 168-52-48125×881300÷25÷4688-534+1128×(29×l25)156×l0l-1563000÷125÷858×72+28×58688-(534-112)
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解:(1)168-52-48,
=168-(52+48),
=168-100,
=68;
(2)125×88,
=125×8×11,
=1000×11,
=11000;
(3)1300÷25÷4,
=1300÷(25×4),
=1300÷100,
=13;
(4)688-534+112,
=688+112-534,
=800-534,
=266;
(5)8×(29×l25),
=8×125×29,
=1000×29,
=29000;
(6)156×l0l-156,
=156×(101-1),
=156×100,
=15600;
(7)3000÷125÷8,
=3000÷(125×8),
=3000÷1000,
=3;
(8)58×72+28×58,
=58×(72+28),
=58×100,
=5800;
(9)688-(534-112),
=688-422,
=266.
解析分析:(1)运用减法性质解答,(2)(5)运用乘法交换律和结合律解答,(3)(7)运用除法性质解答,(4)运用加法交换律解答,(6)(8)运用乘法分配律解答,(9)依据四则运算顺序解答.
点评:本题考查知识点:(1)依据四则运算顺序正确计算,(2)正确运用简便算法解决问题.