1. 1/2 + 3/5 = 11/10 H,4/10 B
2. - 1/5 + 2/7 = - 3/35 C, 3/35 E
3. 4/11 + 2/5 = 2/55 Y,(-2)/55 X
4. 3/7 - ((-1)/4) = 19/28 A, 5/28 D
5. 5/6 × 1 1/5 = -1F,1H
6. (-3)/4 × (-8)/7 = 7/6 O, 6/7 E
7. 11/3 × -3 1/4 = (-13)/3 D,3/13 M
8. 3 ÷ (-1)/3 = -9R,-1S
9. (-5)/7 ÷ 1 2/5 = 1T,-1O
10. (-16 1/5 ) ÷ ( (-27)/10) = 6N,16R
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