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=V49/25 - 0,1=
=7/5 - 1/10=
= 14/10 -1/10=
=13/10=
=1 3/10
f)...=(10/9)^-1 : (5/3)^-2=
=9/10 : (3/5)^2=
= 9/10 : 9/25=
=9/10 * 25/9=
=2 1/2
f)