Oblicz, pamietajac o kolejnosci wykonywania dzialan a) 10×1/5-1/3:1/2+3 1/3 b)2 1/5:6/7+4 1/2-(3/4+1/6):11/15

a) 10×1/5-1/3:1/2+3 1/3 = 10/5 - 1/3x2/1+3 1/3 = 2-2/3+10/3= 1 1/3-10/3=4/3-10/3 = -6/3 = -2 b) 2 1/5:6/7+4 1/2-(3/4+1/6):11/15 = 11/5x7/6 + 9/2 -(9/12+2/12)x15/11 = 77/30 + 9/2 - 11/12x15/11= 77/30 +135/30 - 5/4= 212/30 - 5/4 = 424/60 - 75/60 = 349/60 = 5 49/60

a) 4 2/3 b ) 5 2/5    a ) 10/1 x 1/5 - 1/3 x 2/1 + 10/3 = =2/1 - 2/3 + 10/3 = 6/3 - 2/3 + 10/3 = = 4/3 + 10/3 = 14/3 = 4 2/3 b) 2 1/5 : 6/7 + 4 1/2 - (3/4+ 1/6) : 11/15 = = 11/5 x 7/6 + 9/2 - (9/12 + 2/12) : 11/15 =  = 77/30  + 9/2 - 11/12 : 11/15 =  =77/30 + 135/30 - 11/12 x 15/11 = =212/30 - 5/4= = 424/60 - 100/60 =  = 324/60 = 5 24/60= 5 2/5