问题 解答题

计算下面各题,能简便的用简单运算

(1)27×86+86×73          

(2)201-(960+627)÷23

(3)(250-72)×20            

(4)199×49+49

(5)76×125                 

(6)25×[480-÷16].

答案

(1)27×86+86×73,

=(27+73)×86,

=100×86,

=8600;

(2)201-(960+627)÷23,

=201-1587÷23,

=201-69,

=132;

(3)(250-72)×20,

=178×20,

=3560;

(4)199×49+49,

=(199+1)×49,

=200×49,

=9800;

(5)76×125,

=(80-4)×125,

=80×125-4×125,

=10000-500,

=9500;

(6)25×[480-÷16],

=25×[480-896÷16],

=25×[480-56],

=25×424,

=10600.

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