计算下面各题（可简便计算的应简便计算）．3.87+1.44-0.87+0.5699×0.625+585.16×8.5+1.5×5.16310×（12+13）÷18（124+223）×23+124（37+13）×21．

Question

计算下面各题（可简便计算的应简便计算）．
3.87+1.44-0.87+0.56         
99×0.625+(5)/(8)
5.16×8.5+1.5×5.16       
(3)/(10)×（(1)/(2)+(1)/(3)）÷(1)/(8)
（(1)/(24)+(2)/(23)）×23+(1)/(24)             
（(3)/(7)₊(1)/(3)）×21．

Answer 1

（1）3.87+1.44-0.87+0.56 
=3.87-0.87+（1.44+0.56）
=3.87-0.87+2
=3+2
=5；
       
（2）99×0.625+(5)/(8)
=99×0.625+0.625
=0.625×（99+1）
=0.625×100
=62.5；

（3）5.16×8.5+1.5×5.16  
=5.16×（8.5+1.5）
=5.16×10
=51.6；

（4）(3)/(10)×（(1)/(2)+(1)/(3)）÷(1)/(8)
=(3)/(10)×(5)/(6)÷(1)/(8)
=(1)/(4)÷(1)/(8)
=2；

（5）（(1)/(24)+(2)/(23)）×23+(1)/(24)   
=(1)/(24)×23+(2)/(23)×23+(1)/(24)
=(23)/(24)+2+(1)/(24)
=(23)/(24)+(1)/(24)+2
=1+2
=3；
          
（6）（(3)/(7)₊(1)/(3)）×21
=(3)/(7)×21+(1)/(3)×21
=9+7
=16．