In this Spanish Medium Review quiz you will be looking at adding big numbers in Spanish. To take a look back, in the Spanish Easy Review quiz series you learned how to count to one hundred (100). Here in the Spanish Medium Review series you have learned how to count to nine hundred ninety-nine billion nine hundred ninety-nine million nine hundred ninety-nine thousand nine hundred ninety-nine (999,999,999,999)! Doesn’t that just blow your mind away?

Okay, so you haven’t tackled the billions but they are done exactly the same way as the millions so, technically, you can count all the way up to 999,999,999,999! As you may recall, the word billion in Spanish is billón and a billion is un billón. If you could only count in Spanish that would be pretty impressive but what is even more impressive is that you can do math in Spanish. Oh come on, that’s a fun fact don’t you think!?

Read MoreIf you took the Spanish Easy Review math quizzes you already understand how you are able to do math. Yes, writing out the numerical numbers would be the same in both English and Spanish. However, to help you get better acquainted with the Spanish numbers, we are going to do math by writing out the numbers using letters. Let’s look at the following example.

veinte y cinco + treinta y dos = cincuenta y siete (25 + 32 = 57)

It is pretty simple when your answer doesn’t need to go above one hundred but when you get to big numbers, there are rules that you need to remember. For example, only one hundred (100) is cien. Starting with one hundred and one (101) it becomes ciento and starting with the number one hundred and one (101) the 'y' is no longer used so that one hundred and one in Spanish is ciento uno and NOT ciento y uno.

To say two hundred in Spanish you do not say dos cientos but rather doscientos. A thousand is mil, a million is un millón and, once again, a billion is un billón. There are a few more rules to remember so if you have forgotten any of the rules, please check out the Spanish Medium Review math quizzes titled *Counting in the Hundreds, Counting in the Thousands* and *Counting in the Millions* before taking the quiz section here as it is important that you know the correct structure of how to say the answer. When you believe you understand that structure and order of your numbers then please move on to the quiz. There are ten addition problems. See if you can find the correct Spanish answer. Be sure to watch for the form, spelling and order of numbers.