math help

What is 91/1 + 10/12?

What is 91/1 + 10/12?

This is how you add

91
1
+
10
12

Step 1

Now we need to make our denominators match.

Since 1 is evenly divided by 12, we can multiply just one term to get a common denominator.

Multiply 91 by 12, and get 1092, then we multiply 1 by 12 and get 12.

91/1 times 12

The problem now has new fractions to add:

1092
12
+
10
12

Step 2

Since our denominators match, we can add the numerators.

1092 + 10 = 1102

This yields the answer

1102
12

Step 3

The last step is to reduce the fraction if we can.

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:

1102
12
÷ 2 =
551
6

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...

No good. 7 is larger than 6. So we're done reducing.

There you have it! Here's the final answer to 91/1 + 10/12

91
1
+
10
12
=
551
6
© 2014 Randy Tayler

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