2 1/2 * 48 - 3 2/3 : 1/18 + 5 5/12 * 7/36 = 55 23/432
1) 2 1/2 * 48 = 5/2 * 48 = 5 * 24 = 120
2) 3 2/3 : 1/18 = 11/3 * 18/1 = 11 * 6 = 66
3) 5 5/12 * 7/36 = 65/12 * 7/36 = 455/432 = 1 23/432
4) 120 - 66 = 54
5) 54 + 1 23/432 = 55 23/432
Пояснения:
2 1/2 = (2*2+1)/2 = 5/2
3 2/3 = (3*3+2)/3 = 11/3
5 5/12 = (5*12+5)/12 = 65/12