1. EASY

\(1 + 1=\)

 
2. EASY

\(2 + 2 =\)

 
3. MEDIUM

\(1 + 8 =\)

 
4. MEDIUM

\(2 + 2 =\)

 
5. MEDIUM

\(0 + 10 =\)

 
6. MEDIUM

\(7 + 1 =\)

 
7. MEDIUM

\(9 + 1 =\)

 
8. MEDIUM

\(2 + 6 =\)

 
9. HARD

\(3 + 3 =\)

 
10. HARD

\(4 + 3 =\)