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下面各题怎样简便就怎样算72×58-32×5818×25%+14×60+42×0.250.125×0.25×321116+813-(1116-513)

题目详情
下面各题怎样简便就怎样算
72×58-32×58                
18×25%+14×60+42×0.25
0.125×0.25×32                   
1116+813-(1116-513)
▼优质解答
答案和解析
(1)72×58-32×58         
=(72-42)×58
=30×58
=1740;

(2)18×25%+14×60+42×0.25
=(18+42)×0.25+14×60
=60×0.25+14×60
=15+840
=855;

(3)0.125×0.25×32 
=0.125×0.25×(8×4)
=(0.125×8)×(0.25×4)
=1×1
=1;
                  
(4)1116+813-(1116-513)
=(1116-1116)+(813-513)
=0+300
=300.