57.4 : 4 + 1 1/6 : 4 2/3 - (2,7 + 5 1/20) * 0,8 = 57,4 + 7/6 : 14/3 - (2,7 + 101/20) *0,8
2 1/15 - ( 1 2/3 + 1/5) 31/15 - (5/3 + 1/5)
574 + 7 * 3 - (27 + 101 ) * 8 574 + 1 - ( 27*2 +101) * 8
10*4 6 *14 10 20 10 = 40 4 20 10 =
31/15 - (5/3 + 1/5) 31/15 - ( 5*5 + 1 *3)
15
574/40 + 1/4 - 155/20 * 8/10 = 574/40 + 1/4 - 155*8 /20*10 =
31/15 - 28/15 31 - 28
15
287*5 + 1*25 - 620
= 287/20 + 1/4 - 620/100 = 100 = 840/100 = 840 * 5 = 4200
3/15 1/5 1/5 100 * 1 100
= 42