4-2целых 1/4*(1целая 1/3-5/6)/10

Question

4-2целых 1/4*(1целая 1/3-5/6)/10

Comments

1)) 1 1/3- 5/6= (3•1+1)/3- 5/6= 4/3- 5/6= (2•4)/(2•3)- 5/6= 8/6- 5/6= 3/6= 1/2; 2)) 2 1/4• 1/2= (2•4+1)/4• 1/2= 9/4• 1/2= 9/8;3)) 9/8/10= 9/8• 1/10= 9/804)) 4- 9/80= 3 80/80- 9/80= 3 71/80.

Answer 1

4-2 1/4*(1 1/3-5/6)/10=
1) 1 1/3-5/6=4/3-5/6=8/6-5/6=3/6=1/2
2) 2 1/4*1/2=9/4*1/2=9/4*1/2=9/8
3) 9/8:10=9/8*1/10=9/80
4) 4-9/80=320/80-9/80=311/80=3 71/80