(12 13/30 * 2 1/10 - 25 3/5) : 16/25 + 3 1/4 = 4 целых 3/64
1) 12 13/30 * 2 1/10 = 373/30 * 21/10 = (373*7)/(10*10) = 2611/100 = 26 11/100
2) 26 11/100 - 25 3/5 = 26 11/100 - 25 60/100 = 25 111/100 - 25 60/100 =
51/100
3) 51/100 : 16/25 = 51/100 * 25/16 = (51*1)/(4*16) = 51/64
4) 51/64 + 3 1/4 = 51/64 + 3 16/64 = 3 67/64 = 4 3/64