Sagot :

chrystine

bonjour

A=5/17÷(3/32-1/32)

=5/17÷2/32

=5/17x32/2

=160/34

=(80x2)(17x2)

=80/17

B=11/20-12/23÷-2/23

=11/20-12/23x-23/2

=11/20+276/46

=11/20+6

=120/20+11/20

=131/20

C=7/5÷(-5/21+(-1)/21)

=7/5÷-6/21

=7/5x-21/6

=-147/30

=(-49x3)(10x3)

=-49/10

D=-11/2-(7/3+(-13)/21)

=-11/2-49/21+(-13)/21

=-11/2-62/21

=(-21x11)/(2x21)-(62x2)/(21x2)

=-231/42-124/42

=-355/42

E=-7/5+(-3)/20x-7/3

=-7/5+21/60

=(-7x12)/(5x12)+21/60

=-84/60+21/60

=-63/60

=(-21x3)/(20x3)

=-21/20

F=-8/5+(-7)/3÷32

=-8/5+(-7)/3x-32/5

-8/5-224/15

=(-8x3)/(5x3)-224/15

=-24/15-224/15

=-248/15