计算下面各题,怎样简便就怎样算.26.67+72.8+2.33+4.2 125×32×25 300-123+75-77 (278-78)÷(3

2025-02-24 17:16:14
推荐回答(1个)
回答1:

(1)26.67+72.8+2.33+4.2,
=(26.67+2.33)+(72.8+4.2),
=29+77,
=106;

(2)125×32×25,
=(125×8)×(4×25),
=1000×100,
=100000;

(3)300-123+75-77,
=(300+75)-(123+77),
=375-200,
=175;

(4)(278-78)÷(35+15),
=200÷50,
=4;

(5)16×17+16×82+16,
=16×(17+82+1),
=16×100,
=1600;

(6)280×36+28×640,
=28×360+28×640,
=28×(360+640),
=28×1000,
=28000.