math help

What is 10/6 + 7/10?

What is 10/6 + 7/10?

Here's how you add

10
6
+
7
10

Step 1

We still have different denominators (bottom numbers), though, so we need to get a common denominator. This will make the bottom numbers match. Multiply the denominators together first. Now, multiply each numerator by the other term's denominator.

Now we multiply 10 by 10, and get 100, then we multiply 6 by 10 and get 60.

10/6 times 10

Now for the second term. You multiply 7 by 6, and get 42, then multiply 6 by 10 and get 60.

7/10 times 6

This gives us a new problem that looks like so:

100
60
+
42
60

Step 2

Since our denominators match, we can add the numerators.

100 + 42 = 142

That gives us an answer of

142
60

Step 3

Can this fraction be reduced?

First, we attempt to divide it by 2...

Are both the numerator and the denominator evenly divisible by 2? Yes! So we reduce it:

142
60
÷ 2 =
71
30

Let's try dividing by that again...

Nope! So now we try the next greatest prime number, 3...

Nope! So now we try the next greatest prime number, 5...

Nope! So now we try the next greatest prime number, 7...

Nope! So now we try the next greatest prime number, 11...

Nope! So now we try the next greatest prime number, 13...

Nope! So now we try the next greatest prime number, 17...

Nope! So now we try the next greatest prime number, 19...

Nope! So now we try the next greatest prime number, 23...

Nope! So now we try the next greatest prime number, 29...

Nope! So now we try the next greatest prime number, 31...

No good. 31 is larger than 30. So we're done reducing.

There you have it! Here's the final answer to 10/6 + 7/10

10
6
+
7
10
=
71
30
© 2014 Randy Tayler