#### What Is PEMDAS? Explained for Elementary School Students

Here is everything you need to know about PEMDAS, including how to use it and remember it, examples, and a fun quiz to test what you’ve learned.

Oct 18, 2021

Here is a number sense trick to help you calculate subtraction using mental math.

We want to find the difference of 100 - 76. Using our number sense, we turn to “friendly numbers” to calculate *how far apart* are 76 and 100.

Starting at 76, we can first find how far apart are 76 and 80 (the nearest multiple of 10) and get **4**.

Then, we find how far apart are 80 and 100, and get **20**.

So, 76 and 100 are **4 + 20 = 24** apart, and our final answer is

100 - 76 = 24.

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