Пошаговое объяснение:
( (1 2/5 )² - 1 3/5 )=49/25-1 3/5=1 24/25-1 15/25=9/25
9/25: 8 1/3 =9/25*3/25=27/625
2/3 * 2 1/4=2/3*9/4=3/2
27/625+3/2=54/1250+1875/1250=1929/1250
=1 679/1250
( 2 1/3 - 1 5/6 )³ : 1 1/8 + 30 : 5/28
( 2 1/3 - 1 5/6 )³=( 2 2/6- 1 5/6 )³=(1/2)³=1/8
1/8:1 1/8=1/8*8/9=1/9
30:5/28=30*28/5=168
1/9+168=168 1/9
Пошаговое объяснение:
( (1 2/5 )² - 1 3/5 )=49/25-1 3/5=1 24/25-1 15/25=9/25
9/25: 8 1/3 =9/25*3/25=27/625
2/3 * 2 1/4=2/3*9/4=3/2
27/625+3/2=54/1250+1875/1250=1929/1250
=1 679/1250
( 2 1/3 - 1 5/6 )³ : 1 1/8 + 30 : 5/28
( 2 1/3 - 1 5/6 )³=( 2 2/6- 1 5/6 )³=(1/2)³=1/8
1/8:1 1/8=1/8*8/9=1/9
30:5/28=30*28/5=168
1/9+168=168 1/9