Question

2 512+3+1 1920. помогите решить

Answer 1

2 512+3+ 1 1920= 2 2560+3+1 5760= 3 8260+3=6 8260=7 2260=7 1130

Answer 2

1)2 5/12  +  3 = 29/12  +  3/1 =(29 *1  +  3 *12)/12 = 29/12  +  36/12 =  65/12 = 5 5/12
2)5 5/12  +  1 19/20 = 65/12  +  39/20 =(65*5  +39 * 3)/60 = 325/60+117/60 =  442/60 = 221/30 = 7 11/30
ответ 7 11/30