Date =
Title = Adding binary and overflow errors
Objective = add two 8-bit binary integers and explain overflow errors which may occur
Keywords (leave a space between each and then find their definitions)
Overflow error
Extension: http://www.teach-ict.com/gcse_computing/ocr/214_representing_data/units/quizzes_units.html

http://www.cambridgedigital.com/mooc/html/phase2/33/33_Starter_Activity.html
http://www.cambridgegcsecomputing.org/representation-of-data-in-computer-systems-main http://www.cambridgedigital.com/mooc/html/jan14/33_Activity1/33_Activity1.html

Adding binary number is easy.
You just need to know the rules
1 + 1 = 0 carry 1
1 + 1 + 1 = 1 carry 1

When adding binary always draw out a table with 8 columns and 4 rows
Nu
mb
er

1

Row

Nu
mb
er

2

Row

Ca
rry

Ov
er

Row

An
sw
er



Row


In your books:

http://cambridgegcsecomputing.org/sites/94/upload/userfiles/214d_worksheet1_editedct_2proof.pdf
We will green pen assess in 5 mins

Peer questioning

In pairs:
Ask your partner to convert 6 denary numbers to binary
Then get them to convert 6 binary to denary Using the first 6 conversions as 3 pairs.
Add the resulting binary numbers together
Mark each others work using green pen

Binary Game

Play the Cisco Binary game. Who can get the highest score?
http://forums.cisco.com/CertCom/game/binary_game_page.htm

Homework: Check showmyhomework

Plenary

#GCSEComputing – Explain what an overflow error is and how it could occur