问题
解答题
计算下面各题,能简便的用简便方法计算.
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答案
(1)600÷25÷4,
=600÷(25×4),
=600÷100,
=6;
(2)83×29+71×83,
=83×(29+71),
=83×100,
=8300;
(3)199+199×99,
=199×(99+1),
=199×100,
=19900;
(4)560÷[490÷(34+36)],
=560÷[490÷70],
=560÷7,
=80;
(5)101×99,
=(100+1)×99,
=100×99+1×99,
=9900+99,
=9999;
(6)28×37+73×37-37,
=(28+73-1)×37,
=100×37,
=3700.