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h. 9/10 : 3 = 9/10 x 1/3 = 9/30 = (3 x 3) / (3 x 10) = 3/10
i. - 4/45 : 16/15 = - 4/45 x 15/16 = - 60/720 = (60 x 1) / (60 x 12) = 1/2.
j. - 5/6 : (- 15/18) = - 5/6 x (- 8/15) = 40/90 = (10 x 4) / (10 x 9) = 4/9.
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Bonjour
h. 9/10 : 3 = 9/10 x 1/3 = 9/30 = (3 x 3) / (3 x 10) = 3/10
i. - 4/45 : 16/15 = - 4/45 x 15/16 = - 60/720 = (60 x 1) / (60 x 12) = 1/2.
j. - 5/6 : (- 15/18) = - 5/6 x (- 8/15) = 40/90 = (10 x 4) / (10 x 9) = 4/9.