You will need

- - multiplication tables;
- - table of squares of two-digit numbers;
- calculator.

Instruction

1

To find the square of any

**number**is sufficient only that number multiplied by itself. Example 1. 6*6 =36; 4*4 = 16; 7*7 = 49. The product of the numbers to 10, one digit in the table, familiar to all from elementary school: multiplication table. On the diagonal you can see the squares of the numbers: 1*1=1, 2*2=4, 3*3=9,4*4=16,5*5=25,6*6=36,7*7=49,8*8=64,9*9=81.2

The second level of two-digit numbers (e.g.,

**numbers**16, 79, 54) is defined in the same way: by multiplying the**numbers**themselves. Example 2. 20*20=400; 25*25=625; 40*40=1600. There is a special table of squares of two-digit numbers are placed in the algebra textbook for the seventh grade. It is easy to find the square of any**number**. To do this, divide the number erected in the square for tens and units. Find the intersection of the row-dozen and column units according to the specified table - cell on the intersection will contain the square of this**number**.3

If no table, square

**the number**, you can find the product**number**into itself, made in a column. This method is the square**of a number**consisting of any number of digits. However, the square of a large**number**is better to calculate using a calculator. To do this, multiply on it the specified number with itself. First, dial the desired number using the numeric keypad, then press "*". After that again dial the same number and finally the button "=". The calculator will present on screen the exact answer of a square**number**.