math help

What is 10/3 + 2/10?

What is 10/3 + 2/10?

Here's how we add

10
3
+
2
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 3 by 10 and get 30.

10/3 times 10

Now for the second term. You multiply 2 by 3, and get 6, then multiply 3 by 10 and get 30.

2/10 times 3

This gives us a new problem that looks like so:

100
30
+
6
30

Step 2

Since our denominators match, we can add the numerators.

100 + 6 = 106

That gives us an answer of

106
30

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:

106
30
÷ 2 =
53
15

Now, try the same number again.

Nope. Try the next prime number, 3...

Nope. Try the next prime number, 5...

Nope. Try the next prime number, 7...

Nope. Try the next prime number, 11...

Nope. Try the next prime number, 13...

Nope. Try the next prime number, 17...

No good. 17 is larger than 15. So we're done reducing.

Congratulations! Here's your final answer to 10/3 + 2/10

10
3
+
2
10
=
53
15
© 2014 Randy Tayler