(6,9+2 11/20)*2 3/5 - 3,5 * 2,7 ------------------------------------------ =8 1/9-(2 1/12 -1 1/18):9 1/4(6 9/10 +2 11/20)* 13/5 - 9,45----------------------------------------- =8 1/9-(2 3/36 -1 2/36) : 37/4(6 18/20 +2 11/20)* 13/5 - 9,45------------------------------------------- =8 1/9- 1 1/36 * 4/378 29/20 * 13/5 - 9,45------------------------------- =8 1/9- 37/36 * 4/37189/20 * 13/5 - 9,45------------------------------ =8 1/9- 1/92457/100 - 9,45------------------------ =824,57 -9,45------------------ =815,12-------- = 1,898 или 1) 6,9+2 11/20= 6 9/10 + 2 11/20 = 6 18/20 + 2 11/20 = 8 29/20 = 9 9/202) 9 9/20 * 2 3/5 = 189/20 * 13/5= 2457/100= 24,573) 3,5 * 2,7= 9,454) 24,57 - 9,45= 15,125) 2 1/12 -1 1/18 = 2 3/36 - 1 2/36= 1 1/366) 1 1/36 : 9 1/4 = 37/36 : 37/4= 37/36 * 4/37 = 1/97) 8 1/9 - 1/9 = 88) 15,12 : 8 = 1,89