EXPRESSION FORMATS

TOPIC 02 – POSTFIX NOTATION

LESSON WORK

TASK 1

Try using this Postfix calculator. Note that postfix is often called Reverse Polish Notation.

TASK 2

Evaluate the following postfix expressions by first trying to solve them on your own and then verifying the answers in the calculator above.

a) 7 2 +

b) 10 4 2 * -

c) 6 2 * 5 +

d) 100 10 2 * /

e) 60 5 2 * / 4 +

TASK 3

Write the following infix notations into postfix notations:

a) 4 + 2

b) 7 – 2 + 5

c) 100 / 10 / 10

d) 10 + 2 * 4 – 5

e) (200 / 5 + 10) / 5

You can test your answers by using the calculator in task 1.

TASK 4 (TIME PERMITTING)

Can you find a programming language that uses Postfix? Try installing it. If it works, then let Mr.Campeau know.