(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 * 4/37
8 29/20 * 13/5 - 9,45
------------------------------- =
8 1/9- 37/36 * 4/37
189/20 * 13/5 - 9,45
------------------------------ =
8 1/9- 1/9
2457/100 - 9,45
------------------------ =
8
24,57 -9,45
------------------ =
8
15,12
-------- = 1,89
8
или
1) 6,9+2 11/20= 6 9/10 + 2 11/20 = 6 18/20 + 2 11/20 = 8 29/20 = 9 9/20
2) 9 9/20 * 2 3/5 = 189/20 * 13/5= 2457/100= 24,57
3) 3,5 * 2,7= 9,45
4) 24,57 - 9,45= 15,12
5) 2 1/12 -1 1/18 = 2 3/36 - 1 2/36= 1 1/36
6) 1 1/36 : 9 1/4 = 37/36 : 37/4= 37/36 * 4/37 = 1/9
7) 8 1/9 - 1/9 = 8
8) 15,12 : 8 = 1,89