Page 130 - New Medley 4 Semester 1

4. A factory produced 22575 i-pods in the first month and 62792 i-pods
in the second month. How many i-pods were produced in two months?

5. A mobile company sold 117257 connections in the first year, 327547
connections in the second year and 342575 connections in the third

year. How many connections did it sell in three years taken altogether?

6. A company had sold 74876 computers last year. This year it has sold
12851 more computers than it sold in the last year. How many computers
did it sell this year?

7. Population of a town was 47741 two years ago. It has increased by
52617 since then. What is the population of this town now?

8. A house was made using 21787 bricks. Another house was made using
25211 bricks. How many bricks were used in all?

9. A company sold 39245 televisions in first year, 42764 televisions in
second year and 28140 televisions in third year. How many televisions

did it sell in the three years taken together?

10. An auto company sold 276714 cars in March and 345725 in April month.
How many cars did it sell in these two months?

Properties of Addition

Property 1: Let us add 71729 and 22512.

71729 + 22512 = 94241

Or 22512 + 71729 = 94241

We get the same sum in both cases.

So, we can change the order of two numbers when finding
their sum.

nd
st
nd
st
1 number + 2 number = 2 number + 1 number
A and B be any two numbers then:

A + B = B + A

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