# Math is Figure-Out-Able!

Math teacher educator Pam Harris and her cohost Kim Montague answer the question: If not algorithms, then what? Join them for ~15-30 minutes every Tuesday as they cast their vision for mathematics education and give actionable items to help teachers teach math that is Figure-Out-Able. See www.MathisFigureOutAble.com for more great resources!

## Math is Figure-Out-Able!

# #MathStratChat - September 4, 2024

In today’s MathStratChat, Pam and Kim discuss the MathStratChat problem shared on social media on September 4, 2024.

Note: It’s more fun if you try to solve the problem, share it on social media, comment on others strategies, before you listen to Pam and Kim’s strategies.

Check out #MathStratChat on your favorite social media site and join in the conversation.

Twitter: @PWHarris

Instagram: Pam Harris_math

Facebook: Pam Harris, author, mathematics education

Want more? Check out the archive of all of our #MathStratChat posts!

**Pam **00:00

Hey, fellow mathers! Welcome to the podcast where Math is Figure-Out-Able. I'm Pam Harris.

**Kim **00:06

And I'm Kim Montague,

**Pam **00:07

And this episode is a MathStratChat episode where we chat about our math strategies. Every Wednesday evening, I throw out a maths problem on social media, and people from around the world...around the world, maths...chat about the strategy that they use and comment on each other's thinking.

**Kim **00:22

Okay, so this week, on Wednesday, our math problem was 874 minus 13.9. How would you like to solve this problem? Pause the podcast. Solve it however you want. The problem is 874 minus 13 and 9/10.

**Pam **00:39

Bam.

**Kim **00:40

You went first last time, so I'm going to go first this time.

**Pam **00:42

Alright, go ahead. Except if I know what I want to do, I think, but..

**Kim **00:46

Well, I'm going to go first anyway.

**Pam **00:48

Okay.

**Kim **00:49

I'm going to say 874 minus 14 is 860. And then I'm going to add a tenth because I subtracted one-tenth too much. And I got 860.1

**Pam **01:05

Okay, I was kind of listening while I was doing my own strategy.

**Kim **01:08

Okay, that's fair.

**Pam **01:09

So, I'll compare at the end. How's that? Okay?

**Kim **01:12

Alright.

**Pam **01:12

Okay, so I'm looking at 13.9 on the number line and 874 on the number line. I'm doing what you did last time. And I'm shifting both of those numbers up 6.1. So, if I'm shifting both up 6.1, the 13.9 goes to 20. The 874 goes to 93.1... Wait, 893.1. Right? Yeah. No. 883. Good heavens. 883.1. No, (unclear).

**Kim **01:45

What did you? How much did you shift up?

**Pam **01:47

Hang on a second. 874 plus 6.1 is 880.1

**Kim **01:55

Yeah.

**Pam **01:55

I don't know what I was doing, but I knew it was wrong when I looked at it. Alright, 880.1 minus 20 is 860.1. Is that what you got?

**Kim **02:05

It is. It's funny that you would shift to...

**Pam **02:09

20?

**Kim **02:10

20. Which, you know like, I think a lot of people want to shift to, like, a nice round number that you're going to subtract.

**Pam **02:17

What would you have shifted to? (unclear).

**Kim **02:18

I actually would have just shifted to 14 because I see the 74 and 74 and 14 is nice.

**Pam **02:24

Oh, sure enough. So, if I shifted it to 14, then it would be 874.1 minus 14. Haha. Alright, this is probably the least efficient strategy I've ever done on MathStratChat, but there you go. Hey, maybe that will give everybody permission to be less efficient your first go around, and then mathematical behavior. Look back at what you did and decide, "Hey, I want my brain to do that next time."

**Kim **02:50

You solved the problem and you know how to use lots of relationships. I call it a win.

**Pam **02:56

Thanks. I appreciate that, Kim.

**Kim **02:57

Alright, we can't wait to see what you do every week at MathStratChat. We hope you join us and let us know how you think about the problems. And we love it the most when you comment on everyone else's strategies.

**Pam **03:08

Oh, we love it when you do that. Yeah. And we post the problems on Wednesdays around 7pm Central Time. When you answer, tag me and use the hashtag MathStratChat. Then join us here to hear how we're thinking about the problem. Thanks for being part of the Math is Figure-Out-Able movement and making math more and more figure-out-able.