B = (4/5 - 2) x (3/4 - 2/3) B = (4/5 - 2 x 5 / 1 x 5) x (3 x 3 / 4 x 3 - 2 x 4 / 3 x 4) B = (4/5 - 10/5) x (9/12 - 8/12) B = - 6/5 x 1/12 B = - 6/60 B = 6 x - 1 / 6 x 10 B = - 1/10
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maudmarine
C'est pour réduire la fraction au maximum
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Verified answer
B = (4/5 - 2) x (3/4 - 2/3)B = (4/5 - 2 x 5 / 1 x 5) x (3 x 3 / 4 x 3 - 2 x 4 / 3 x 4)
B = (4/5 - 10/5) x (9/12 - 8/12)
B = - 6/5 x 1/12
B = - 6/60
B = 6 x - 1 / 6 x 10
B = - 1/10