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Sagot :

MAUDMARINE

Bonjour,

Résoudre :

10/21 × 7/15

= 70/315

= (35 x 2) / (35 x 9)

= 2/9

-3/10÷4/5

= - 3/10 x 5/4

= - 15/40

= (5 x - 3) / (5 x 8)

= - 3/8

6/-7 ÷-12/11

= - 6/7 x - 11/12

= 66/84

= (6 x 11) / (6 x 14)

= 11/14

26/-49×-28/13

= 728/637

= (91 x 8) / (91 x 7)

= 8/7.

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