Question

помогите решить, позяязя :3

Answer 1

1)не верно
2×1/3-1/4=2/3-1/4=8/12-3/12=
=5/12
2)верно
11/14÷3 1/7=11/14÷22/7=
=11/14×7/22=1/4=0.25
3) верно
1.75-2 1/3=1 3/4-2 1/3=
=1 9/12-2 4/12=1 9/12-1 16/12=
=-7/12
4)не верно
1.6÷(2/3÷5/6)=1 3/5÷(2/3×6/5)=
=8/5÷4/5=8/5×5/4=2