Modular Addition and Multiplication
Modular arithmetic is based on the remainder after division. To solve each problem, first add or multiply the numbers, then divide by the modulus and find the remainder.
For example: 17 (mod 5) =2
it is because when we do 17/5 it leaves a remainder of 2.
What is 7 + 8 (mod 5) ?
Multiplication
What is 4 x 5 (mod 6) ?
Addition
What is 9 + 7 (mod 6)
This applet helps students practice modular addition and multiplication using a picture and interactive questions. It shows how to find the remainder and understand modular arithmetic.
Classroom use:
This activity can be used in class to introduce or review modular arithmetic. Students can use the picture to understand the concept and answer the questions to check their understanding.