Question

выполните действия
а) (1/2+1/5) : 2 -3/10
б)(3/4 - 5/12) * 8 +1/18
в) ( 7/15 + 4/5) : 3 - 1/9
г) (3/7-1/21) *14 - 1/6

Answer 1

а) (5/10+2/10):2-3/10= 7/20-6/20=1/20
б)(9/12-5/12)*8+1/18=4/12*8+1/18= 8/3+1/18=49/18=2 13/18

Answer 2

в) (7/15+12/15):3-1/9= 19/45-5/45=14/45

Answer 3

г)(9/21-1/21)*17-1/6=

Answer 4

г)(9/21-1/21)*14-1/6=8/21*14-1/6=16/3-1/6=32/6-1/6=31/6=5 1/6