516/21+4,79-12 23/35-5 5/,21) вычислите наиболее удобным

-5 16/21+4,79-12 23/35-5 5/21-(-3,21) = 
(-5 16/21-5 5/21) + (4,79+3,21) -12 23/35 = 
-11 + 8 - 12 23/35 = -15 23/35

= - 5 16/21 + 4,79 - 12 23/35 - 5 5/21 + 3,21 = ( 4,79 + 3,21) - ( 5 16/21 + 5 5/21) -
- 12 23/35 = 
= 8 - 11 - 12 23/35 = 
= - 3 - 12 23/35 =
= - 15 23/35