1. EASY

\(1-1=\)
 
2. MEDIUM

\(5-2=\)
 
3. MEDIUM

\(5-1=\)
 
4. MEDIUM

\(8-7=\)
 
5. MEDIUM

\(4 - 2 = \)
 
6. MEDIUM

\(9-5=\)
 
7. MEDIUM

\(7-5=\)
 
8. HARD

\(8-3=\)
 
9. HARD

\(10-7=\)
 
10. HARD

\(10-3=\)


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