math help

What is 78/10 + 2/10?

What is 78/10 + 2/10?

This is how you add

78
10
+
2
10

Step 1

Since our denominators match, we can add the numerators.

78 + 2 = 80

Now we have an answer.

80
10

Step 2

Last of all, we need to simplify the fraction, if possible. Can it be reduced to a simpler fraction?

To find out, we try dividing it by 2...

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

80
10
÷ 2 =
40
5

Now, try the same number again.

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

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

Are both the numerator and the denominator evenly divisible by 5? Yes! So we reduce it:

40
5
÷ 5 =
8
1

Now, try the same number again.

No good. 5 is larger than 1. So we're done reducing.

Congratulations! Here's your final answer to 78/10 + 2/10

78
10
+
2
10
=
8
1
= 8
© 2014 Randy Tayler