Summary

Summary

● Use of commas helps us in reading and writing large numbers.

● Use of commas differs in the Indian and the International Systems.

● Comparing any two numbers, the one with more digits is larger.

● Comparing any two numbers, if the digits are the same, the number that has a greater left most digit is larger.

● Using BIDMAS, we can avoid the common arithmetic mistakes.

● Large numbers are needed for various situations in our daily life.

● The situations where we do not need the exact quantity give rise to estimation or approximation.

● Estimation is approximating a quantity to a reasonable accuracy.

● Rounding of a number involves in getting a quick, desired and rough estimate of it.

● If zero is included in the collection of Natural numbers (N), we get the collection of Whole numbers (W), W = {0, 1, 2, …}.

● ‘0’ is the smallest whole number.

● ‘0’ and ‘1’ are the additive and multiplicative identities of whole numbers respectively.

● Whole numbers can be added or multiplied in any order and hence Commutative.

● Multiplication of Whole numbers is both Commutative and Associative.

● Multiplication is Distributive over addition for Whole numbers.

● Division by ‘0’ is not defined.