# 1st Class Mathematics Back & Forth Counting Back and Forth Counting

## Back and Forth Counting

Category : 1st Class

BACK AND FORTH COUNTING

Back and Forth Counting

Understanding and applying basic mathematics is an essential skill set for a student to learn. In this chapter you will know about the back and forth counting.

Forth Counting

Look at the following figures:

In forth counting, we count from smaller to greater numbers.

•              Example:

Back Counting

Look at the following figures:

In .back counting we count from greater to smaller numbers.

Reverse Counting

Reverse counting is back counting or counting backward. The reverse counting goes as given below:

What Comes before

In forth counting, smaller number always comes before greater number.

Example:

Here,

$[\,3\,]$ comes just before $[\,4\,]$ &

$[\,4\,]$ comes just before $[\,5\,]$

In forth counting

Numbers coming before $[\,5\,]$ are $[1]\,\,[2]\,\,[3]\,\,[4]$.

Numbers coming before $[\,4\,]$ are $[\,1\,]\,\,[\,2\,]\,\,[3\,]$.

•          Example:

Here,

$[\,6\,]$ comes just before $[\,5\,]$

$[\,5\,]$ comes just before $[\,4\,]$

In Back Counting,

Numbers coming before $[\,0\,]$ are $[\,1\,]\,\,[\,2\,]\,\,[\,3\,]\,\,[\,4\,]\,\,[\,5\,]\,\,[\,6\,]$

Numbers coming before $[\,1\,]$ are $[\,2\,]\,\,[\,3\,]\,\,[\,4\,]\,\,[\,5\,]$

What Comes After

Just remember that greater number always comes after smaller number in forth counting.

•           Example:

Here,

$[\,9\,]$ comes just after $[\,8\,]$

$[\,10\,]$ comes just after $[\,9\,]$

In forth counting,

Numbers coming after $[\,8\,]$ are $[\,9\,]\,\,\,[\,10\,]\,\,\,[\,11\,]\,\,\,[\,12\,]\,\,\,[\,13\,]\,\,\,[\,14\,]$

Numbers coming after $[\,9\,]$ are $[\,10\,]\,\,\,[\,11\,]\,\,\,[\,12\,]\,\,\,[\,13\,]\,\,\,[\,14\,]$

•          Example:

Here,

$[\,27\,]$ comes just after $[\,28\,]$

$[\,28\,]$ comes just after $[\,29\,]$

In back counting,

Numbers coming after $[\,29\,]$ are $[\,28\,]\,\,\,[\,27\,]\,\,\,[\,26\,]\,\,\,[\,25\,]$

Numbers coming after$[\,28\,]$ are$[\,27\,]\,\,\,[\,26\,]\,\,\,[\,25\,]$

Counting in Tens

Look at the following:

One ten $=1\,ten\,\,=\,\,[\,10\,]$

Two tens $=2\,ten\,\,=\,\,[\,20\,]$

Three tens $=3\,ten\,\,=\,\,[\,30\,]$

Trick:

Just put a single zero (0) in place often.

One ten = 1 ten = 10

Two tens = 2 tens = 20

Three tens = 3 tens = 30

From the above given explanation, it is clear that while counting in tens, put number in the left side and a single zero (0) in the right side.

•           Example:

Now, it is clear that counting in 10's goes as:

10, 20, 30, 40, 50, 60, 70, 80, 90, 100,...................... so on.

Counting in Twenties

Look at the following:

One twenty = 1 twenty = [20]

Two twenties = 2 twenty = [40]

Three twenties = 3 twenty = [60]

•          Example:

Here, we double the two that becomes [4] and put it on the left, while the word twenties written in the right get replaced by zero (0).

Skip Counting

Skip counting is counting by a number that is not 1. eg. 3, 6, 9, 12,_____is an example of skip counting by 3.

Numbers and Their Name

Let us look at the following patterns:

 Number Counting Number Name One Two Three Four Five

Let us look at the number counting and their appropriate name as given below:

##### 15 10

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