Частина 2. Номер 80
800 – 500 – 100 = 200;
200 + 300 + 400 = 900;
900 + 90 + 9 = 999;
800 + 80 + 7 = 887;
400 + 1 = 401;
400 – 1 = 399.
800 – 500 – 100 = 200;
200 + 300 + 400 = 900;
900 + 90 + 9 = 999;
800 + 80 + 7 = 887;
400 + 1 = 401;
400 – 1 = 399.