ОТМЕЧУ ЛУЧШИМ Вычислите: -2/13-1/6 -3/8+1/2 1/3-2/5
-2/13-1/6= -12/78-13/78=-25/78 -3/8+1/2= -3/8+4/8= 1/8 1/3-2/5 = 5/15-6/15=-1/15
-2/13-1/6=-2*6/13*6-13/6*13=-12/78-13/78=-25/78 -3/8+1/2=-3/8+4/2*4=-3/8+4/8=1/8 1/3-2/5=5/3*5-2*3/5*3=5/15-6/15=-1/15