Question

Вычеслите удобным способом:
а) 12•17+35•13+17•23;
б) 41•80-25•41+55•29;

Answer 1

а) = 17(12+23) + 35*13 = 17*35 + 35*13 = 35*(17 + 13)=35*30 =1050
б) = 41(80-25) + 55*29 = 41*55 + 55*29 = 55(41+ 29) = 55*70 =3850