问题 解答题
怎样算简便就怎样算.
4×28+56×28(125-70)×828×4×5
32×12547×99+47719×85-719×75.
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.

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