The computer science teacher's 80-minute class will include: - A 5-minute warm up - Three 10-minute student presentations - Five 5-minute sessions converting between decimal, binary, octal, and hexadecimal numbering systems - Two 2-minute classroom norm and exit ticket activities The class will cover converting between decimal and other numbering systems, with students splitting into groups to create tables for the different bases. Homework includes developing a flowchart and HTML page for number conversions.

1. Agenda = 80 min
Warm up 5 min
Converting between decimal and binary 5 m
On line quiz 10 min
Home work and Exit ticket 5 min
Student presentation 10 m
Converting between decimal and octal 5 m
Student presentation 10 m
Converting between decimal and hexadec 5 m
Student presentation 10 m
Converting between numbering systems 15 min

2. Classroom Norms 2
Classroom NormsClassroom Norms
Osama Ghandour Geris Assiut STEM School

3. What are the applications which
use computer systems ? Mention
3 applications
Warm up brain storm 2min
What is a computer ? Define it
How does a computer work?
Assiut STEM School Mr. Osama Ghandour Computer Science

4. Hexadecimal system base 16
What are the numbering systems?
Decimal system base 10
Binary system base 2
Octal system base 8
Learn the concept
Assiut STEM School Mr. Osama Ghandour Computer Science

5. Convert fromDecimal system
To Binary systemand vise versa
Converting 3 min
Assiut STEM School Mr. Osama Ghandour Computer Science

6. From Decimal to Binary
Assiut STEM School Mr. Osama Ghandour Computer Science
31
1248163264128
11111000
1248163264128
16+8+4+2+1
11111

7. From Binary to Decimal
Assiut STEM School Mr. Osama Ghandour Computer Science
11111
01234567
11111
01234567
31
𝟏 ∗ 𝟐 𝟒
+𝟏 ∗ 𝟐 𝟑
+1∗ 𝟐 𝟐
+ 𝟏 ∗ 𝟐 𝟏
+1*𝟐 𝟎
16+8+4+2+1=

8. Example 2
Converting 3 min
Assiut STEM School Mr. Osama Ghandour Computer Science

9. From Decimal to Binary
Assiut STEM School Mr. Osama Ghandour Computer Science
52
1248163264128
001011000
1248163264128
32+16+4
𝟏𝟏𝟎𝟏𝟎𝟎 𝟐

10. From Binary to Decimal
Assiut STEM School Mr. Osama Ghandour Computer Science
01234567
110101
01234567
43
𝟏 ∗ 𝟐 𝟓
+ 𝟎 ∗ 𝟐 𝟒
+𝟏 ∗ 𝟐 𝟑
+0∗ 𝟐 𝟐
+ 𝟏 ∗ 𝟐 𝟏
+1*𝟐 𝟎
32+0+8+0+2+1=
𝟏𝟎𝟏𝟎𝟏𝟏 𝟐

11. Convert fromDecimal system
To Octal systemand vise versa
Converting 3 min
Assiut STEM School Mr. Osama Ghandour Computer Science

12. From Decimal to Octal
Assiut STEM School Mr. Osama Ghandour Computer Science
96
1864512…………
04100000
1864512…………
1*64+4*8
(𝟏𝟒𝟎) 𝟖

13. From Octal to Decimal
Assiut STEM School Mr. Osama Ghandour Computer Science
01234………
141000
0123…………
97
𝟎 ∗ 𝟖 𝟓
+ 𝟎 ∗ 𝟖 𝟒
+𝟎 ∗ 𝟖 𝟑
+1∗ 𝟖 𝟐
+ 𝟒 ∗ 𝟖 𝟏
+1*𝟖 𝟎
0+0+0+64+32+1=
(𝟏𝟒𝟏) 𝟖

14. Convert fromDecimalsystem
To Hexadecimal systemandvise
versa
Converting 3 min
Assiut STEM School Mr. Osama Ghandour Computer Science

15. From Decimal to Hexadecimal
Assiut STEM School Mr. Osama Ghandour Computer Science
291
1162564096……………
32100000
1162564096…………
1*256+2*16+3*1
(𝟏𝟐𝟑) 𝟏𝟔

16. From Hexadecimal to Decimal
Assiut STEM School Mr. Osama Ghandour Computer Science
(𝟏𝟐𝟒) 𝟏𝟔
0123…………
421000
0123…………
292
𝟎 ∗ 𝟏𝟔 𝟒
+𝟎 ∗ 𝟏𝟔 𝟑
+1∗ 𝟏𝟔 𝟐
+ 𝟐 ∗ 𝟏𝟔 𝟏
+4*𝟏𝟔 𝟎
0+0+256+32+4=

17. Assiut STEM School Mr. Osama Ghandour Computer Science
0123……………
1115100000
1*256+F*16+B*1
D
C
H
X
10A
11B
12C
13D
14E
15F
(𝟏𝐅𝐁) 𝟏𝟔
𝟎 ∗ 𝟏𝟔 𝟑
+1∗ 𝟏𝟔 𝟐
+ 𝟏𝟓 ∗ 𝟏𝟔 𝟏
+11*𝟏𝟔 𝟎
507 0+256+240+11=
From Hexadecimal to Decimal

18. From Hexadecimal to Decimal
Assiut STEM School Mr. Osama Ghandour Computer Science
(𝟏𝐅𝐀) 𝟏𝟔
012345……
10151000
012345……
506
𝟎 ∗ 𝟏𝟔 𝟑
+1∗ 𝟏𝟔 𝟐
+ 𝟏𝟓 ∗ 𝟏𝟔 𝟏
+10*𝟏𝟔 𝟎
0+256+240+10=
D
C
H
X
10A
11B
12C
13D
14E
15F

19. Another way

20. Convert from
Hexadecimal
to binary
directly

21. Using calculator

22. What is happening inside a
computer ?

23. Now could you design
a 7 segment displayer
system for bank?

24. What is
happening
when you
press any
key ?
E in column Nu. 4 and in raw Nu 5

25. Ask me questions
Ask me questions
Assiut STEM School Mr. Osama Ghandour Computer Science

26. You will be divided in
4 groups LUXR ,
ASSIUT , CIRO , ALX.
XDecimal
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Design a table of decimal to XGroup
From decimal to BinaryLUXR
from decimal to OctalASSIUT
From decimal to
Hexadecimal
CIRO
????AlX
hexadecimaloctalbinarydecimal
0
….
15
AlX

27. 1-- convert a decimal nu. 15 to its
binary valueand mentionat least 3
methods for converting with
explanationof at least 2 methods .
Questions
Assiut STEM School Mr. Osama Ghandour Computer Science

28. Designa flowcharttoconvertfrom
decimalnumberto binarynumber?
Home work 1
Assiut STEM School Mr. Osama Ghandour Computer Science

29. 1-Writeaformulatoconvert anumber
inaformof(𝒏) 𝑥 toitsdecimalnumber?
2-Writeaformulatoconvertadecimal
numbertoanumberofBasey ?
Exit ticket 2 min
Assiut STEM School Mr. Osama Ghandour Computer Science

30. Develop an html page to
convert a decimal
number to Base x
number (N) 𝑥?
Home work 2

31. https://twitter.com/osamageris
https://www.linkedin.com/in/osamaghandour/
https://www.youtube.com/user/osmgg2
https://www.facebook.com/osama.g.geris
Osama Ghandour Geris Assiut STEM School
31Find me @

32. Thanks