Ex:2
A=1+3/5
=5/5+3/5
=8/5
B=2-2/7
=2×7/7-2/7
=14/7-2/7
=12/7
C=-3+8/3
=-3×3/3+8/3
=-9/3+8/3
=-1/3
D=1/2+1/3
=3/6+2/6
=5/6
e=4/5-2/3
=4×3/5×3-2×5/3×5
=12/15-10/15
=2/15
f=3/4+1/6
=18/24+4/6
=22/4
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Ex:2
A=1+3/5
=5/5+3/5
=8/5
B=2-2/7
=2×7/7-2/7
=14/7-2/7
=12/7
C=-3+8/3
=-3×3/3+8/3
=-9/3+8/3
=-1/3
D=1/2+1/3
=3/6+2/6
=5/6
e=4/5-2/3
=4×3/5×3-2×5/3×5
=12/15-10/15
=2/15
f=3/4+1/6
=18/24+4/6
=22/4