Uses
CRT;
var
a, b, rez: integer;
key: char;
Begin
repeat
randomize;
a := random(100);
b := random(100);
write(a, '-', b, ':=');
readln(rez);
if rez = (a - b) then
write('Верно')
else
write('Не верно');
writeln;
write('Повторить? (Y/N)');
readln(key);
until UpCase(key) <> 'Y';
readln
End.