Вычислите : 1) - 5/12 - 3/4 ) ÷ 2 1/3 + 5 1/3 × 0,75 ; 2
1) -5/15 - 3/4 = -(5/12+3/4) = -(5/12 + 9/12) = -14/12 = -1_2/12 = -1_1/6 2) -2_1/3 + 5_1/3 * 0,75 : 2 = -1/3 3 1 2 1,2) 5_1/3 * 0,75 : 2 = 16/3 * 3/4 * 1/2 = (16*3*1)/(3*4*2) = 2 3) -2_1/3 + 2 = -1/3