问题
解答题
递等式计算.(能简便的要简便计算,并写出主要过程)
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答案
(1)628-46+454,
=582+454,
=1036;
(2)164+36÷3×16,
=164+12×16,
=164+192,
=356;
(3)(80-1)×125,
=80×125-1×125,
=10000-125,
=9875;
(4)(49+49+49+49)×250,
=(49×4)×250,
=49×(4×25),
=49×100,
=4900;
(5)45×54+45×45+45,
=45×(54+45+1),
=45×100,
=4500;
(6)25×[364÷(201-173)],
=25×[364÷28],
=25×13,
=325.