1 19/20-z=1/4
z = 1 19/20 - 1/4
z =1,7
Пошаговое объяснение:
1 19/20 - 1/4 =
= 1 19/20 - (1*5)/(4*5)=
= 1 19/20 - 5/20 =
= (1 + 19/20) - 5/20=
= 1+(19/20-5/20)=
= 1 + 14/20= 1+7/10 =1 + 0,7 = 1,7
1 19/20-z=1/4
z = 1 19/20 - 1/4
z =1,7
Пошаговое объяснение:
1 19/20 - 1/4 =
= 1 19/20 - (1*5)/(4*5)=
= 1 19/20 - 5/20 =
= (1 + 19/20) - 5/20=
= 1+(19/20-5/20)=
= 1 + 14/20= 1+7/10 =1 + 0,7 = 1,7