21,345 - 20 =

(a)  

45,89 - 21,9 =

(a)  

4,98 + 6,17 =

(a)  

101,38 + 0,189 =

(a)  

2,05 - 1,87 =

(a)  

34,9 - 25,37 =

(a)  

175,89 - 30 =

(a)  

18,758 - 11,087 =

(a)  

38,09 + 14 =

(a)  

4,08 + 1,05 + 7 =

(a)