Question

найдите значение выражения (2 5/9-1 20/21):1 8/49+1 8/9:6

Answer 1

2 5/9-1 20/21=2-1 +5/9-20/21=1+35/63-60/63=1+(-25/63)=63/63-25/63=38/63
1 8/9:6=17/9*1/6=17/54
38/63:1 8/49=38/63*49/57=2/9*7/3=14/27
14/27+17/54=28/54+17/54=45/54=5/6

Answer 2

а ещё одно сможешь?

Answer 3

какое?

Answer 4

(1 17/18*1 13/14-2 5/8:1 19/20):(2 25/78-1 1/26)

Answer 5

1 17/18*1 13/14=35/18*27/14=5/2*3/2=15/4=3 3/4 2 5/8:1 19/20=21/8*20/39=7/2*5/13=35/26=1 9/26 3 3/4-1 9/26=3-1+3/4-9/26=2+39/52-18/52=2 21/52 2 25/78-1 1/26=2-1+25/78-1/26=1+25/78-3/78=1 22/78=1 11/39 2 21/52:1 11/39=125/52*39/50=5/4*3/2=15/8=1 7/8

Answer 6

спасибо