To add fractions.
weighing scales
In finding the LCM or HCF of two or more numbers
Unless you are an electrical engineer or a math teacher, every number you will ever use in a real world situation will be a real number.
You use the LCM when you want to add or subtract fraction and then you can use the HCF to simplify the result. You may want to do this when budgeting: for example one quarter of your pay goes on rent, two fifths goes on food and drink, and so on. So how much of your pay is available for discretionary spending?
the bunnies :)
Use the GCF to reduce fractions. Use the LCM to add and subtract unlike fractions. Carpenters work with fractions a lot.
weighing scales
In finding the LCM or HCF of two or more numbers
Unless you are an electrical engineer or a math teacher, every number you will ever use in a real world situation will be a real number.
Well, since there is no such thing as a sphare in the real world, it is a bit hard to tell what it can or cannot use.
Any. They can be integers, rational numbers (the same thing if you multiply out by their LCM), real numbers or even complex numbers.
use a absolute value to represent a negative number in the real world
Finding the LCM will help you add and subtract fractions. Finding the GCF will help you reduce fractions.
Yes
use a absolute value to represent a negative number in the real world
you use the lcm (least common multiple).
You use the LCM when you want to add or subtract fraction and then you can use the HCF to simplify the result. You may want to do this when budgeting: for example one quarter of your pay goes on rent, two fifths goes on food and drink, and so on. So how much of your pay is available for discretionary spending?