Réponse :
Bonjour. Voici ma réponse:
1°) A=11/10
B=3/100
C=14,4/8
D=6/6=1
2°)A=1/2+1/4=1x2/2x2+1/4=2/4+1/4=3/4
B=1/2+5/6=1x3/2x3+5/6=3/6+5/6=8/6
F=7/12+5/3=7/12+5x4/4x4=7/12+20/12=27/12
G=2+1/3=2/1+1/3=2x3/1x3+1/3=6/3+1/3=7/3
C=10/3+5/6+19/12=10x4/3x4+5x2/6x2+19/12=40/12+10/12+19/12=69/12
D=5x9/2x9+11/18+5x6+3x6=45/18+11/18+30/18=86/18
3) a.12/14x21/20=2x2x3x7x3/7x2x2x2x5=3x3/2x5=9/10
b.5/6x2/15=5x2/2x3x5x3=1/3x3=1/9
c.12/14x14/12=1/1
4)a.3x5x3x2/2x7x5x5=3x3/5x7=9/35
b.5x2x3/11x3x2x2x2x3=5/11x3x2x2=5/132
c.3x3x3x2x7x3/2x7x2x3=3x3x3/2=27/2=13,5
5)a.(7/12+1x2/6x2)x3/2=(7/12+2/12)x3/2=9/12x3/2=3x3x3/2x2x3x2=9/8
b.(10:2/8:2-1/4)x(7/12+2x4/3x4)=3/4x15/12=3x5x3/2x2x4x3=15/16
c.7/8-1/2x1/4=7/8-1/8=6/8
d.4/5-1/3x2/15+4/30=4/5-2/45+4/30=4x9/5x9-2/45+4/30=36/45-2/45+4/30=34/45+4/30=34/45+4x1,5/30x1,5=34/45+6/45=40/45
Cordialement
Anir
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