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怎样算简便就怎样算.25×137×404200-1934-1066290×54+29×46046×102+308.

题目详情
怎样算简便就怎样算.
25×137×40   
4200-1934-1066    
290×54+29×460   
46×102+308.
▼优质解答
答案和解析
(1)25×137×40,
=25×40×137,
=1000×137,
=137000;

(2)4200-1934-1066,
=4200-(1934+1066),
=4200-3000,
=1200;

(3)290×54+29×460,
=290×54+290×46,
=290×(54+46),
=290×100,
=29000;

(4)46×102+308,
=46×(100+2)+308,
=46×100+46×2+308,
=4600+92+308,
=4600+(92+308),
=4600+400,
=5000.