①317×99+317②3720-4028÷38×6  ③

发布时间:2020-08-07 13:37:05

①317×99+317      
②3720-4028÷38×6     
③48×(-)
④2.5+2.8+2.2+6.5               
⑤19÷[(+)÷].

网友回答

解:①317×99+317    
=317×(99+1)
=317×100
=31700;
②3720-4028÷38×6 
=3720-106×6
=3720-636
=3084;
③48×(-)
=48×-48×
=32-12
=20;
④2.5+2.8+2.2+6.5        
=(2.5+6.5)+(2.8+2.2)
=9+5
=14;
⑤19÷[(+)÷]
=19÷[×2]
=19÷
=10;
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