问题
解答题
用简便方法计算.
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答案
(1)28.75-5.37-4.63,
=28.75-(5.37+4.63),
=28.75-10,
=18.75;
(2)7000÷8÷125,
=7000÷(8×125),
=7000÷1000,
=7;
(3)57×83+83×43,
=(57+43)×83,
=100×83,
=8300;
(4)48×25,
=12×(4×25),
=12×100,
=1200.