Tell me everything you know about decimals ?

Question

In maths.

Answer 1

Decimals, like fractions, are parts of a whole. (I see you're the same person who asked that. Hee.)

Decimals have two parts, the whole part and the decimal part. In a certain decimal, say 1.5, 1 is the whole part, and 5 is the decimal part.

Answer 2

To multiply a decimal by 10, you move the decimal point one place to the right, adding a zero first if the decimal point is already at the right hand end.

To divided a decimal by 10, you move the decimal point one place to the left, adding a zero first if the decimal point is already at the left hand end.

When adding or subtracting decimal numbers, align them so that the decimal points are all beneath each other. Then do the arithmetic as for integers, keeping the decimal point in the answer aligned with the others.

When multiplying two decimal numbers, ignore the decimal points. Carry out the multiplication as for integers. Add together the number of decimal places in the two numbers being multiplied. That is the number of decimal places in the answer.

To divide decimal number B by decimal number A, move the decimal point in A right until it is at the end. Move the decimal point in B right the same number of places. In the answer, place the decimal point above the newly positioned decimal point in B.

Answer 3

http://en.wikipedia.org/wiki/Decimal