Current Affairs 1st Class

Category : 1st Class

ADDITION

Concept of Addition

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

Let's understand this through an example:

•          Example:

There are three balls in box A

There are two balls in another box B

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:

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:

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.

Addition of Three Numbers

It is the grouping of three numbers and counting them as a single unit.

•         Example:

It is also written as

Here, also apply the same method of putting vertical lines.

Trick:

Follow the vertical line trick, to check it.

Addition of Figures

Let's consider about 2, 4, 11, 18, etc. In fact these are simply numbers.

But, when we say

Then the numbers represent a figure. Therefore, it is clear that when numbers come in the form of representing something, they become a figure.

Now, we add figures with the simple method of addition that we have learned so far.

•         Example:

Addition of Images

It means grouping of two or more pictures together.

•         Example:

Addition in Column

Addition in column is done by adding the numbers in column. See the examples 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:

toffees.

•         Example:

Jack has 24 toffees. His friend gives him 20 more toffees. How many toffees does Jack have now?

(a) 42 toffees                                                                  (b) 20 toffees

(c) 24 toffees                                                                  (d) 44 toffees

(e) None of these

Answer (d)

Explanation: Option (d) is correct because:

toffees.