Bài 6:

program tien_dien;
uses crt;
var a : integer;
begin
clrscr;
write('nhap dien nang tieu thu :');readln(a);
writeln('tien dien phai tra la :', a*1500);
readln
end.

Bài 7:

program tinh;
uses crt;
var a, b : integer;
begin
clrscr;
write('nhap gia tri so nguyen a :');readln(a);
write('nhap gia tri so nguyen b :');readln(b);
writeln('tong hai so nguyen la :', a+b);
readln
end.

Bài 8:

program ten;
uses crt;
var a : integer;
    b :string; 
begin
clrscr;
write('nhap ho va ten  :');readln(b);
write('nhap nam sinh cua ban :');readln(a);
writeln('Ho Va Ten :', b);
writeln('Tuoi cua ban la :', 2021 - a);
readln
end.

Bài 9:

program ten;
uses crt;
var a, b, c: real;
begin
clrscr;
write('nhap diem toan  :');readln(a);
write('nhap diem ly :');readln(b);
write('nhap diem hoa :');readln(c);
writeln('diem trung binh cua ba mon la :', (a+b+c)/3:8:2);
readln
end.

Bài 10:

program tinh;
uses crt;
var a, b : integer;
begin
clrscr;
write('nhap gia tri so nguyen a :');readln(a);
write('nhap gia tri so nguyen b :');readln(b);
writeln('tong binh phuong hai so nguyen la:', sqr(a+b) );
readln
end.

Bài 11:

program tinh;
uses crt;
var a, b, c, d, n : integer;
begin
clrscr;
write('nhap so n :');readln(n);
a := n div 1000;
b := (n mod 1000) div 100;
c := (n mod 100 div 10);
d := (n mod 10);
writeln('tong cac so cua n la :', a+b+c+d);
readln
end.

6

#include<iostream>

using namespace std;

int main()

{

    float kwh = 0;

    cin >> kwh;

    cout << "Tien dien hang thang la: "" << kwh * 1500;

}

7

#include<iostream>

using namespace std;

int main()

{

    int a,b;

    cin >> a >> b;

    cout << "Tong " << a << " va " << b << " la: " << a+b;

}

8

#include<iostream>

using namespace std;

int main()

{

    string name;

    getline(cin,name);

    int age;

    cin >> age;

    cout << "So tuoi cua ban la: " << 2021 - age;

}

9

#include<iostream>

using namespace std;

int main()

{

    float ma,phy,che;

    cin >> ma >> phi >> che;

    cout << "So diem trung binh ba mon la: " << (ma+phy+che)/3;

}

10

#include<iostream>

#include<math.h>

using namespace std;

int main()

{

    int a,b;

    cin >> a >> b;

    cout << pow(a,2) + pow(b,2);

}

11

#include<iostream>

using namespace std;

int main()
{
    int n;
    cin >> n;
    int f,t = 0;
    for(int i = 0;i <= n;i++)
    {
        f = n % 10;
        n /= 10;
        t += f;
    }
    cout << t;
}