Before adding or subtracting two fractions they are converted into like fractions. Explain with examples why this is necessary.
Unlike fractions have denominators that are unequal, and therefore cannot be added or subtracted. If two fractions need to be added or subtracted they must first be converted to like fractions.
Fractions that are equivalent have the same values when simplified.
Fractions can be converted to decimals, percentages or mixed numbers.
Yes they should
In fractions, you can NEVER add or subtract
It depends on what you want to convert to proper fractions. Not all things can be converted to proper fractions.
They can both be converted into decimals and from there into fractions or percentages.
Fractions can be converted into decimals and they mean the same thing.
The relationship between fractions and decimals can be seen as follow. Fractions can be represented as ratio of two numbers and on dividing can give a decimal value. And decimal value can be converted into a fraction too.
LCD is the Lowest Common Denominator which is the lowest number into which the denominators of all the fractions will each divide exactly. Each of the fractions can then be converted to an equivalent fraction with the new denominator which then allows the fractions to be added and/or subtracted.