3 7/15*0.25+5/6-1 2/5; 5 .4:(3/20+0.75)

Question

3 7/15*0.25+5/6-1 2/5;
5 .4:(3/20+0.75)

Answer 1

=3 7/15×25/100+5/6-1 2/5=
=52/15×1/4+5/6-7/5=13/15+5/6-7/5=
=26/30+25/30-42/30=9/30=3/10
₩₩₩₩₩₩
=5 4/10÷(3/20+75/100)=
=5 2/5÷(3/20+3/4)=27/5÷(3/20+15/20)=
=27/5÷18/20=27/5÷9/10=27/5×10/9=6