F
1:1/3+2/5=US
22/7+344=1
3. 3+3/4= ( )
4. 11/4+21/3= 0)
5. 2/3-1/5= 0
6. 3/4+2/3= 0)
7.2+3/7=0
8. 21/3-5/6= ( )
9.5/6+2/3-1/2 = ( )
10. 3/4-1/2+2/3= ( )​