In high school math, I often memorized a procedure without understanding what was happening. Here's one specific step in factor by grouping that I didn't really understand until I became a teacher.
Happy March Forth! Support the marching arts!
Impress your friends with this mental math trick
It's Mental Math Monday with sixth grade teacher Camden from North Dakota. How would you mentally calculate 25×16?
Let's learn about lattice multiplication and why it works
"Tried"? :(
Can people give me trick toss ideas because I am running out lol
Did you know there are infinitely many primes numbers? Here's how we can prove this.
One of the biggest "tricks" in algebra is "slide and divide." I honestly didn't understand why it worked until around 20 years after algebra class. Here's why it works.
I wish I was taught this way of finding the greatest common factor
The permutation and combination formulas don't just have to be formulas to memorize. Here's how we can derive the permutation and combination formulas.
youtu.be/OA8IR-1TZMU?...
It's Mental Math Monday with the creator of Desmos, @eluberoff.bsky.social! With the digits 1, 1, 2, and 3, how many different 4-digit numbers can you create?
Also bonus question: What holiday was Desmos released on?
A selfie of me and a group of people.
Thank you CPM for having me speak at your conference!
Rifle or sabre?
I wish I was taught this way of finding the greatest common factor when I was in school
I know a lot of people think about 3 ÷ 1/2 as "how many 1/2 fit into 3?" but there is another model!
Here are two ways we can think about division.
Hot take: We need to stop racing to the final answer in math class.
If we only teach the procedure to get the answer, we would get so many false positives. Yeah, they got the right answer, but do they actually understand the math?
For any prime number p 5 or greater, p²-1 will always be a multiple of 24. Here's how we can show this.
It's Mental Math Monday! How would you mentally calculate 360÷8?
New trick toss unlocked
I couldn't find a video deriving the difference of cubes formula from scratch so I made one lol
Since Valentine's Day is coming up...
Flirt, but make it mathematical. I'll go first:
If I am cos²x, you are sin²x, because together we're 1.
Reading the Common Core State Standards, it talks about dividing by place value in 4th and 5th (implies long division), "standard algorithm" in 6th (implies long division), and explicitly says "long division" in 7th grade so it should still be taught in those states.
I keep seeing stories of long division not being taught so is this happening in a specific state?
I got a request to visualize why 1/2 ÷ 5/6 = 3/5, so here's how we can think about it.
People who like even numbers: "I like even numbers."
People who like odd numbers: "I like odd numbers."
People who like prime numbers: "PRIME NUMBERS ARE AMAZING! DID YOU KNOW THERE ARE INFINITELY MANY PRI-"
How to visually approximate square roots
Valentine's Day is coming up so here's how you can make intertwined hearts with your Valentine using math.
It's Mental Math Monday! How would you mentally calculate 81-39?
The long division algorithm CAN be understandable and not just something to memorize. Here's how we can make sense of it.
