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简算题756+497289-103625-599317-125-25187+25-8783+108+17589+26+174203-86248-(48-26)

题目详情
简算题
756+497   289-103   625-599     
317-125-25      187+25-8783+108+17      
589+26+174          203-86           248-(48-26)
▼优质解答
答案和解析
(1)756+497   
=756+500-3
=1256-3
=1253;

(2)289-103 
=289-(100+3)
=289-100-3
=189-3
=186;

(3)625-599     
=625-(600-1)
=625-600+1
=25+1
=26;     

(4)317-125-25      
=317-(125+25)
=317-150
=167;

(5)187+25-87
=187-87+25
=100+25
=125;

(6)83+108+17      
=83+17+108
=100+108
=208;   

(7)589+26+174          
=589+(26+174)
=589+200
=789;

(8)203-86           
=203-(90-4)
=203-90+4
=113+4
=117;

(9)248-(48-26)
=248-48+26
=200+26
=226.