2.1:- Square
1)The square of a number is the product of a number multiplied by itself.
Example: The square of 4 is 4 x 4 = 16
2)The square of a number is written using the square notation.
Example: ¼ x ¼ is written as (¼)²
3)Before calculating the square of a mixed number, change the mixed number into an improper fraction.
4)The square of a positive or negative number is always positive.
5)The number of decimal places in the square of a decimal is twice the number of decimal places (d.p.) of the decimal number which is being squared.
6)The squares of numbers can be estimated by using two methods:
Example: The square of 4 is 4 x 4 = 16
2)The square of a number is written using the square notation.
Example: ¼ x ¼ is written as (¼)²
3)Before calculating the square of a mixed number, change the mixed number into an improper fraction.
4)The square of a positive or negative number is always positive.
5)The number of decimal places in the square of a decimal is twice the number of decimal places (d.p.) of the decimal number which is being squared.
6)The squares of numbers can be estimated by using two methods:
(a) Method 1: Round off the number to the nearest whole number and calculate the square of that number.
(b) Method 2: Determine the range of the square of that number. If the estimated answer is in within the range,then it is a reasonable answer.
7)Perfect squares are the squares of whole numbers.
Example:0, 1, 4, 9, 16, 25, ...
8)A number is a perfect square when it is a product of two of the same numbers.
7)Perfect squares are the squares of whole numbers.
Example:0, 1, 4, 9, 16, 25, ...
8)A number is a perfect square when it is a product of two of the same numbers.
