1.
2-4分之1×3分之2÷1又9分之7÷12分之1
= 2-1/6*9/16*12
=2-9/8
=7/8
2.
5分之4×3分之2+5分之1÷4分之3
=8/15+1/5*4/3
=8/15+4/15
=12/15
=4/5
3.
(5分之1+10分之33×30分之1-8÷300)÷4分之1
=(1/5+33/300-8/300)*4
=(60/300+33/300-8/300)*4
=85/300*4
=17/15
1.
2-4分之1×3分之2÷1又9分之7÷12分之1
= 2-1/6*9/16*12
=2-9/8
=7/8
2.
5分之4×3分之2+5分之1÷4分之3
=8/15+1/5*4/3
=8/15+4/15
=12/15
=4/5
3.
(5分之1+10分之33×30分之1-8÷300)÷4分之1
=(1/5+33/300-8/300)*4
=(60/300+33/300-8/300)*4
=85/300*4
=17/15