addition + Fact of adding something; thing that is added ☊ additional + Further or added ☊ addition ☊ 
phép cộng ☊ addition ☊ sự sát nhập ☊ addition + Fact of adding something; thing that is added ☊ additional + Further or added ☊ addition ☊ phép cộng ☊ addition ☊ sự sát nhập ☊