math help

What is 45/3 + 1/10?

What is 45/3 + 1/10?

This is how we add

45
3
+
1
10

Step 1

Can you add yet? Nope! The denominators don't match. We need a common denominator. So next we take both denominators and multiply them. Next, take each numerator and multiply it by the denominator of the other term.

So, we multiply 45 by 10, and get 450, then we multiply 3 by 10 and get 30.

45/3 times 10

Now for the second term. You multiply 1 by 3, and get 3, then multiply 3 by 10 and get 30.

1/10 times 3

We now have a new problem, that looks like this:

450
30
+
3
30

Step 2

Since our denominators match, we can add the numerators.

450 + 3 = 453

Answer:

453
30

Step 3

Now, do we need to simplify this fraction?

First, we attempt to divide 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:

453
30
÷ 3 =
151
10

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...

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...

No good. 11 is larger than 10. So we're done reducing.

And we're done! Here's the final answer to 45/3 + 1/10

45
3
+
1
10
=
151
10
© 2014 Randy Tayler