1. Computer Programming 12 Mr. Jean February 11 th, 2014

2. The plan: Video clip of the day Review of Binary Review of Decimal Hexadecimal to Decimal Hexadecimal to Binary

3. 125 10 =>5 x 10 0 = 5 2 x 10 1 = 20 1 x 10 2 = 100 125 Base Weight Example in Decimal:

4. Example in Binary: 101011 2 => 1 x 2 0 = 1 1 x 2 1 = 2 0 x 2 2 = 0 1 x 2 3 = 8 0 x 2 4 = 0 1 x 2 5 = 32 43 10 Bit “0”

5. Hexadecimal to Decimal Hexadecimal DecimalOctal Binary

6. Hexadecimal to Decimal Technique –Multiply each bit by 16 n, where n is the “weight” of the bit –The weight is the position of the bit, starting from 0 on the right –Add the results

7. Example ABC 16 =>C x 16 0 = 12 x 1 = 12 B x 16 1 = 11 x 16 = 176 A x 16 2 = 10 x 256 = 2560 2748 10

8. Hexadecimal to Binary Hexadecimal DecimalOctal Binary

9. Hexadecimal to Binary Technique –Convert each hexadecimal digit to a 4-bit equivalent binary representation

10. Example 10AF 16 = ? 2 1 0 A F 0001 0000 1010 1111 10AF 16 = 0001000010101111 2

11. Decimal to Hexadecimal Hexadecimal DecimalOctal Binary

12. Decimal to Hexadecimal Technique –Divide by 16 –Keep track of the remainder

13. Example 1234 10 = ? 16 1234 10 = 4D2 16 16 1234 77 2 16 4 13 = D 16 0 4

14. Try this exercise Don’t use a calculator! DecimalBinary Hexa- decimal 33 1110101 1AF

15. Exercise – Convert … DecimalBinary Hexa- decimal 3310000121 117111010175 45111100001 1 1C3 43111010111 1 1AF Answer

16. To do: Complete #1 & #2 on worksheet #2 (the backside of the page we were working on)

17. Moodle Login