Practice on change base

Express each binary number in decimal

  1. 1001
  2. 11011
  3. 11011011
  4. 100000
  5. 11111111
  6. 110111011011
    7.

Express each decimal number in binary

  1. 34
  2. 61
  3. 223
  4. 400
  5. 1024
  6. 12340
    7.

Express each hexadecimal number in decimal

  1. 3A
  2. 1E9
  3. 3E7C
  4. A03
  5. 209D
  6. 4B07A
    7.

Express each decimal number in hexadecimal

  1. 34
  2. 61
  3. 223
  4. 400
  5. 1024
  6. 12340
    7.

If it is possible, you can write codes to check your answers.