21^2:3/7+21^2 0,2 от 86,5 86,5+(0,2*6) а)1/4*4 3/4*16/57+(4 3/4+1 2/3)*16/21+2/27*4 1/2...

Question

21^2:3/7+21^2

0,2 от 86,5
86,5+(0,2*6)

а)1/4*4 3/4*16/57+(4 3/4+1 2/3)*16/21+2/27*4 1/2
б)(4/5+1/6)*(23 2/3-15 5/9)*45/58 -1/2

Answer 1

(4/5+1/6)*(23 2/3-15 5/9)*45/58 -1/2 =5 7/12 1/4*4 3/4*16/57+(4 3/4+1 2/3)*16/21+2/27*4 1/2=5 5/9

Comments

А остальное