You multiply to get a common denominator. Whatever number u multiplied the bottom number by u have to do to the numerator too. Then u add them simply.
it stay the same when you subtract fractions and when you add fractions.
In fractions, you can NEVER add or subtract
Fractions! Otherwise you don't have anything to add.
Change them into mixed numbers and add the integers and fractions together ensuring that the fractions have a common denominator.
No.
no
add by adding
Change them to like fractions and proceed.
Because you can't add or subtract fractions that have different denominators. Making them like fractions, by multiplying so the denominators are the same, you can add and/or subtract them.
with a calculator
No.
They are all 2 stroke 200cc motors. Unless you add a big bore kit then its 248cc