(1)0.4:0.36,
=0.4÷0.36,
=
10
9 ;
(2)360千克:0.45吨,
=360千克:450千克,
=360千克÷450千克,
=0.8;
(3)
2
3 :
3
4 ,
3 ÷
8
9 .