-5 + (-3) =

(a)  

 $\sqrt{25}=$  

(a)  

6 + 6 =

(a)  

-15 + (-15) =

(a)  

 $\sqrt{100}\ =$  

(a)  

 $\sqrt{49}\ =$  

(a)  

 $6^2$  

(a)  

4 + (-4) =

(a)  

 $2^2$  

(a)  

-2 + (-5) + (-3) =

(a)  

-10 + 6 =

(a)  

 $\sqrt{4}=$  

(a)  

30 - 40 =

(a)  

 $8^2$  

(a)