SS1 Second Term Mathematics Lesson Note – Modular Arithmetic

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WEEK 1

TOPIC: Modular Arithmetic

CONTENT:

• Revision of addition and subtraction of integers
• Revision of multiplication and division of integers
• Concept of modular arithmetic/Cyclic events

Revision of addition, subtraction, multiplication and division of integers

Recall: Integer is a counting whole numbers, either positive or negative. Examples 1,5,20,-1,-5 etc

These numbers can be added, subtracted, divided or multiplied.

Addition of integers;

486+289=775

-25+(-78)=-103

Subtraction of integers;

582-328=254

902-437=465

Multiplication of integers;

181×42=7602

208×5=1040

Division of integers;

972÷27=972/27=36

1008÷12=1008/12=84

Class Activity:

Solve the following;

3092+216+1801=() ̇

2968-989=() ̇

318×2=() ̇

420÷12=() ̇

Concept of Modular Arithmetic

The word Modular implies consisting of separate parts or units which can be put together to form something, often in different combinations.

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