а) (7357+2848)+5152 = 10205+5152 = 15357б) (54271+39999)+10001 = 94270+10001 = 104271в) 19999+(4801+15200) = 19999+20001 = 40000г) 18356+(1644+2135) = 18356+3779 = 22135
а) (7357+2848)+5152 = 10205+5152 = 15357
б) (54271+39999)+10001 = 94270+10001 = 104271
в) 19999+(4801+15200) = 19999+20001 = 40000
г) 18356+(1644+2135) = 18356+3779 = 22135