A =6/3=2/1
B=5/6-1/3=5/6-1*2/2*3=3/6=1/2
C=30/4
D=20/14
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Bonjour,A=2/3+4/3=6/3=2x3/3=2
B=5/6-1/3
1/3=1x2/2x3=2x/6
B=5/6-2/6=3/6=3x1/3x2=1/2
C=6x5/4=2x3x5/2x2=15/2
D=4/7x5/2=2x2x5/7x2=10/7
E=16/5-0.2
0.2=2/10=2x1/2x5=1/5
E=16/5-1/5=15/5=3x5/5=3
F=3/2-1/14
3/2=3x7/2x7=21/14
F=21/14-1/14=20/14=2x5/2x7=5/7
G=3/4-1/4=2/4=2x1/2x2=1/2
H=(7/8+5/4x2)=7/8+(5/4x2)
5/4x2=2x5/2x2=5/2
5/2=5x4/2x4=20/8
H=7/8-20/8=-13/8
A =6/3=2/1
B=5/6-1/3=5/6-1*2/2*3=3/6=1/2
C=30/4
D=20/14