简便方法:6分之1乘3.5+6.5除6 76乘60%加5分之3乘21 [4分之3减(16分之7减0.25)]乘9分之17

问题描述:

简便方法:6分之1乘3.5+6.5除6 76乘60%加5分之3乘21 [4分之3减(16分之7减0.25)]乘9分之17

1、1/6*3.5+6.5/6
=1/6*3.5+6.5*1/6
=(3.6+6.5)*1/6
=5/3
2、76*3/5+3/5*21
=(76+21)*3/5
=97/(3/5)
=(100-3)*3/5
=60-9/5
=58又5分之1
3、[4分之3减(16分之7减0.25)]乘9分之17
=[3/4-(7/16-1/4)]*17/9
=[3/4-(7/16-4/16)]*17/9
=[12/16-3/16]*17/9
=9/16*17/9
=17/16