问题
解答题
下面各题怎样简便就怎样算.
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答案
(1)25×7×4,
=25×4×7,
=100×7,
=700;
(2)32+26+74+168,
=(32+168)+(26+74),
=200+100,
=300;
(3)63×25+25×37,
=25×(63+37),
=25×100,
=2500;
(4)99×32+32,
=(99+1)×32,
=100×32,
=3200;
(5)25×44,
=25×4×11,
=100×11,
=1100;
(6)48×213-13×48,
=48×(213-13),
=48×200,
=9600.