Explications étape par étape:
-3/27+2/3=-9 /81+54/81= 45
9/8-5/6= 54/ 48- 40/48= 14/48
-3/27×9/8= -27/216
(2/3)/(5/6)= (2/3)×(6/5)=12/15
(-3/27-2/3÷9/8+5/6)×15= -3/27(-2/3×8/9)+5/6)×15=(-3/27-16/27+5/6)×15= (-19/27+5/6)×15= (-114/162+ 135/162)×15= 21/162×15= 315/162
