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Sagot :

KAVITHA01

Réponse:

Bonjour,

Calculer puis simplifier si possible:

A=4/9 + 1/27

=12/27+1/27

=13/27

B= -2/3 + 3/4

= -8/12+9/12

= 1/12

C= -7/25+ 3/15

= -7/25+5/25

=-2/25

D=1/2 - (-2/6) + 4/9+5/-6

=1/2-(-1/3)+4/9+5/-6

=5/6+4/9+5/-6

=23/18+5/-6

=4/9

LYNDA26

Bonjour, voici les réponses à ta question:

A = 4/9 + 1/27 = 12/27 + 1/27 = 13/27

B = -2/3 + 3/4 = -8/12 + 9/12 = 1/12

C = -7/15 + 3/15 = -4/15

D = 1/2 - (-2/6) + 4/9 + 5/-6

   = 1/2 + 2/6 + 4/9 - 5/6

   = 1/2 + 4/9 - 3/6

   = 9/18 + 8/18 - 9/18

   = 8/18

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