Вычислите:(2,3) 6 2/3×(-1,8)+16,5÷(-2 3/4) ----------------------------------- 1/3-8/15 (4/5-0,9-0,225)×8/13 ----------------------------- 2/5÷8
=3/20×(-5/9)+2/33÷(-4/11) 3-8/15 =15/11+2/33×(-11/4) -5/15 =15/11-6 -3/1=11-90/15 -3/1=-79/15 -3/1=-5×15/4 -3/1
чо