Current Affairs 1st Class

Category : 1st Class

                                                                                                         Addition

Concept of Addition

Addition means collection of different units together and counting them as single

• Example:

There are three balls in box A 

A

Three balls   

There are one ball in another box B

B    

One ball

Now,

How many balls are there in both the boxes together?

For this, we put the balls from both the boxes in a single box as shown below:

Four balls

Therefore, the third box has three balls of box A and one ball of box B. Together there are 4 balls.

Addition of Two Numbers

It is the grouping of two numbers together and counting them as a single number.

• Example:

               2 + 3 = 5

It is also written as:

Trick:

Put two vertical lines for 2 and three vertical lines for 3. After this, count all the lines together and that line will be the final result of this addition.

2 + 3  = 5

• Example:

          +         = 

Addition in Column

Addition in column is done by adding the numbers in column. See the example given below:

• Example:

Word Problem Based on Addition\

In word problem some statements are given. These statements are to be solved by means of addition

• Example:

Steve has 12 toffees. His father gives him 10 more toffees. How many toffees does Steve have now?

(a) 2 toffees                                (b) 10 toffees

(c) 12 toffees                              (d) 22 toffees

(e) None of these

Answer (d)

Explanation: Option (d) is correct because:

12 + 10 = 22  toffees.