11. 34,56+2,34=ldots 12. (21)/(3)-(13)/(6)=... 13. 12,3times 3,2= 14. (13)/(4):2(1)/(8)=... 15. 3(1)/(7)+2(2)/(3)=... 16. (3)/(5)+(2)/(3)-(2)/(3):(4)/(6)=... 17. 50,4-2,38=... 18. 3(2)/(6)times 2(4)/(5)=... 19. 6,08:1,6=... 20. 3,45+(1)/(5)=... 21. (24)/(8)-3+(30)/(6):5=...

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