résolu

Calcule et donne le resultat sous la forme d'une fraction irreductible
A:6|7-4|7*5|2

B:2|3-3|2*4|9+1|2

C:2-1|3+5+5|6

D:2|5÷3-7|10

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Droopetteask
A:6/7-4/7*5/2
=6/7-20/14
=6/7-10/7
=-4/7

B:2/3-3/2*4/9+1/2
=2/3-12/18+1/2
=2/3-2/3+1/2
=4/6-4/6+3/6
=3/6
=1/2

C:2-1/3+5+5/6
=12/6-2/6+30/6+5/6
=45/6
=15/2

D:2/5÷3-7/10
=2/5*1/3-7/10
=2/15-7/10
=4/30-21/30
=-17/30
 A = 6/7 - 4/7 * 5/2
= 6/7 - 20/14
= 12/14 - 20/14
= -8/14
= -4/7

B = 2/3 - 3/2 * 4/9 + 1/2
= 2/3 - 12/18 + 1/2
= 12/18 - 12/18 + 1/2
= 1/2

C = 2 - 1/3 + 5 + 5/6 
= 5/3 + 35/6
= 10/6 + 35/6
= 45/6
= 15/2

D = 2/5 : 3 - 7/10
= 2/15 - 7/10
= -17/30

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