1. Squares

2. Squares Example: Square of a = a2 = a x a Square of 4 = 42 = 4 x 4
“Squaring” a number means to raise a number to the second power
Example:
Square of a = a2 = a x a
Square of 4 = 42 = 4 x 4
Square of 9 = 92 = 9 x 9
Square of 16 = 162 = 16 x 16

3. Squares of Number upto 20 (need to be thorough)
Numbers
Squares
Numbers
Squares 1 1 11
121 2 4 12
144 3 9 13
169 4 16 14
196 5 25 15
225 6 36 16
256 7 49 17
289 8 64 18
324 9 81 19
361 10
100 20
400

4. Square of a rational number

5. Square of a fraction
Example:
Square of a decimal number
0.52 = 0.5 x 0.5 =0.25
0.122 = 0.12 x 0.12 =0.0144

6. By multiplication rule of integers, - x - = +
Square of a negative number
(-6)2 = -6 x -6 = + 36
(-0.4)2 = -0.4 x -0.4 =
By multiplication rule of integers, - x - = +

7. Try these
Find the square of the following numbers 6
-14
0.5