1.1.11 Squares and Square Roots

Question 1

In printed tables which amount of digits is more accurate?

Answer 1

4.

Question 2

How do you use a squares printed table if you wanted to know the square of 1.732?

Answer 2

Go down the column to the first two significant figures i.e. 1.7. Then across the rows to the next significant i.e. 3 and then further across to 2. Add the results together.

Question 3

Although the printed tables allow you to do squares 1-10, how would you do a number over this i.e. 168.8.

Answer 3

Break it down by 100 so its 1.688² x 100².

Question 4

How do you position the decimal point in the answer?

Answer 4

For each period moved to the left the decimal must move back right one.

Question 5

What is a period in square root terms?

Answer 5

Breaking up of a number greater than 100 or less than one to find its square root. Each pair of figures is called a period.

Question 6

How can you find the cube root?

Answer 6

Find the factors of the number and times them all together i.e. 216 gives 2,2,2,3,3,3 (2x3)x(2x3)x(2x3) = 6x6x6