This is how we add
|
||||||||||||||||||||||||||||||||
Step 1Of course, you can't add two fractions if the denominators (bottom numbers) don't match. To get a common denominator, multiply the denominators together. Then we fix the numerators by multiplying each one by their other term's denominator. Now you multiply 55 by 9, and get 495, then we multiply 55 by 9 and get 495. Do the same for the second term. We multiply 3 by 55, and get 165, then multiply 55 by 9 and get 495. The problem now has new fractions to add:
|
||||||||||||||||||||||||||||||||
Step 2Since our denominators match, we can add the numerators. 495 + 165 = 660 This yields the answer
|
||||||||||||||||||||||||||||||||
Step 3The last step is to reduce the fraction if we can. To find out, we try dividing it by 2... No good. So next you try the next prime number, which is 3... Are both the numerator and the denominator evenly divisible by 3? Yes! So we reduce it:
So far so good... let's try to divide by that number again. No good. So next you try the next prime number, which is 5... Are both the numerator and the denominator evenly divisible by 5? Yes! So we reduce it:
So far so good... let's try to divide by that number again. No good. So next you try the next prime number, which is 7... No good. So next you try the next prime number, which is 11... Are both the numerator and the denominator evenly divisible by 11? Yes! So we reduce it:
So far so good... let's try to divide by that number again. No good. 11 is larger than 4. So we're done reducing. And we're done! Here's the final answer to 55/55 + 3/9
|