Look at the picture and tell the names of

different inventions.

DIFFERENT INVENTIONS

Motivation

Tony wants to know the sum of 1432 and 9865 at once. Which of the inventionsshall he use to get the answer?

ON CE C OFF

7 8 ÷9

X654

1 2 3 -

0 = +

Power on Power off

Clear the last entry.

0-9 are numberkeys

Clear all entries.

screen

Division sign

multiplication

subtraction

additionEqual sign

PARTS OF A CALCULATORPARTS OF A CALCULATOR

Each group will write the parts of the calculator and post it on the board.

OFF 0-9

ON

CE

C X

+

÷

=

-

Can you name the parts of a calculator. What are the parts of a calculator?

Answer the following

questions. What signs will you press on the calculator if...

1. You want to find out the sum of 24 and 57.2. You want to close the calculator.

3. You want to open the calculator.4. You want to find the product of 8 and 7.5. You want to find the difference of 200 and 57.

Identify the following parts of a calculator.

ON CE C OFF

7 8 ÷9

X654

1 2 3 -

0 = +

PARTS OF A CALCULATORPARTS OF A CALCULATOR

1

7

8

9

4

210

3

5

6