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.
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 \[[\,1\,]\,\,[\,2\,]\,\,[3\,]\].
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.
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 \[[\,10\,]\,\,\,[\,11\,]\,\,\,[\,12\,]\,\,\,[\,13\,]\,\,\,[\,14\,]\]
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.
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]
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:
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