问题
解答题
怎样算简便就怎样算.
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答案
(1)4×28+56×28,
=(4+56)×28,
=60×28,
=1680;
(2)(125-70)×8,
=125×8-70×8,
=1000-560,
=440;
(3)28×4×5,
=28×(4×5),
=28×20,
=560;
(4)32×125,
=4×(8×125),
=4×1000,
=4000;
(5)47×99+47,
=47×(99+1),
=47×100,
=4700;
(6)719×85-719×75,
=719×(85-75),
=719×10,
=7190.