Understanding Real Numbers and Decimal Movement

The video tutorial explains how to rewrite numbers as real numbers by adjusting the decimal point based on the order of magnitude. If the magnitude is positive, the decimal moves to the right, and if negative, it moves to the left. The tutorial provides examples for both positive and negative magnitudes, demonstrating the process of moving the decimal point accordingly.

What happens to the decimal point when the order of magnitude is positive?

• It disappears.

• It stays in the same place.

• It moves to the right.

• It moves to the left.

In the example given, how many places is the decimal point moved to the right for the number 6.25?

• One place

• Four places

• Two places

• Three places

What is the result of moving the decimal point four places to the right for the number 6.25?

• 625000

• 62500

• 6250

• 625

When moving the decimal point to the left, what is the first step?

• Divide the number by 10.

• Count the number of places to move.

• Multiply the number by 10.

• Add zeros to the right.

In the example of moving the decimal to the left, how many places is it moved?

• Three places

• Five places

• Two places

• Four places