- The number system contains ten digits 0,1,2,3,4,5,6,7,8,9.
Largest and smallest numbers:
- The smallest one digit number is 1.
- The largest one digit number is 9.
- The smallest two digit number is 10.
- The largest two digit number is 99.
- The smallest three digit number is 100.
- The largest three digit number is 999.
- 10 Ones = 1 Ten
- 10 Tens = 1 Hundred
- 10 Hundreds = 1 Thousand
Place Value of each digit in a number:
In a four digit number, there are four places named:
Ones place. Tens place. Hundreds place and Thousands place.
Ascending Order of numbers:
Arranging numbers from the least number to the largest number is called Ascending Order.
Ex: 13, 67, 132, 168 are in ascending order
Descending Order of numbers:
Arranging numbers from the largest number to the least number is called Descending Order.
Ex: 168, 132, 67, 13 are in descending order.
Symbols used for comparison of two numbers:
This is the "equal to” sign. When we use it between two numbers, it means that the numbers on both sides of the sign have the same value.
Ex: 53 = 53
This is the "greater than" sign. It is placed between two numbers in such a way that the
open side is towards the bigger number.
Ex: 43 > 34
This is the “less than" sign. It is placed between two numbers in such a way that the closed side is towards the smaller number.
Ex: 57 < 69
Rules for comparison of numbers:
A numeral containing more digits is greater.
Ex: 163 > 35
If two numerals contain the same number of digits, the numeral having greater digit at the left most place will be greater.
If the left most digits are also the same, we go to next digit from left and compare.
Successor of a numeral:
Successor of a particular numeral comes just after that numeral. So, we can find out the successor of a numeral by adding 1 to the given numeral.
Ex : The successor of 99 is 99 + 1 or 100.
Predecessor of a numeral:
Predecessor of a particular numeral comes just before that numeral. So, we can find out the
predecessor of a numeral by subtracting 1 from more...