To add fractions.
By using the decimal numbers, you are now using the concept of fraction. There are some situation where we can apply the fraction, for example, cooking, medicine, sewing and tailoring :)
A fjord is a real world example of a fjord! They exist in the real world.
An airplane flying in a specific direction at a specific speed.
2 is a real world prime number.
Recipes!
To add fractions.
By using the decimal numbers, you are now using the concept of fraction. There are some situation where we can apply the fraction, for example, cooking, medicine, sewing and tailoring :)
You use fractions for LOTS of things in the real world like money, gambling, shopping, clothing, etc.
A fjord is a real world example of a fjord! They exist in the real world.
Whenever we are dealing with rational fractions.
An airplane flying in a specific direction at a specific speed.
You use fractions (or some variation, such as decimals) in any situation where whole numbers are not sufficient. For example, when you want to measure the object of a length in meters, and a whole number of meters is not precise enough.
The question presumes that math classes are not part of the real world, which is debatable. The GCF can be used to simplify fractions. Carpenters and chefs use fractions in practical, non-academic settings.
Use the GCF to reduce fractions. Use the LCM to add and subtract unlike fractions. Carpenters work with fractions a lot.
The Equator is a real world example, being the circumference of the Earth.
When adding or subtracting fractions with different denominators and when reducing fractions to their lowest terms.