Pam  0:01  
Hey, fellow mathers! Welcome to the podcast where Math is Figure-Out-Able. I'm Pam.

Kim  0:07  
And I'm Kim. 

Pam  0:07  
This episode is a MathStratChat episode because we chat about our math strategies. Every Wednesday evening, I throw out a math problem on social media, at least when I remember, and people chat about strategies they use and comment on each other's thinking.

Kim  0:21  
Okay, so this Wednesday, we had a little bit larger of a problem. We had 24,524 minus 12,875.

Pam  0:32  
Holy cow, if you can have all those digits in your head, all you car drivers.

Kim  0:36  
Let me say it again. 24,524

Kim  0:41  
minus 12,875. Give that a go, and then come on back.

Pam  0:44  
Alright. Well, I'm going to go first this time. I'm thinking 12,875 feels a lot like 13,000. So, I'm going to find the difference between these numbers, and I'm going to say that the difference between 12,875 and 24,524 is going to be the same as... I'm going to pop up to 13,000.

Kim  1:07  
Okay. 

Pam  1:07  
And to do that pop up, that was, let's see, 125. Is that right? Yeah, 125. So, then I've got to take that 24,524 and also pop it up by 125. Let's see that would make that 24,000... 125,649. So, I've turned the problem into an equivalent 24,649 minus 13,000. 24,000 minus 13,000 is 9,000. 9,640... 

Kim  1:38  
Wait, wait. what did you say? 24,000?

Pam  1:40  
Minus. Oh, is that 11? 

Kim  1:41  
Yeah. 

Pam  1:42  
Wow. 11,649. Thanks for catching me.

Kim  1:43  
Mmhm.

Pam  1:43  
Oh, yeah, I was thinking about 3 minus 4, not 4 minus 3.

Kim  1:52  
Yeah, yeah. 

Pam  1:52  
Okay. So close. Alright, what do you got?

Kim  1:54  
Are you writing it horizontally? 

Pam  1:55  
I

Pam  1:56  
am. 

Kim  1:56  
Yep. 

Pam  1:57  
Yeah, because I wrote the equivalent problem. I wrote the 24,000 lalala. Minus the 12,000 lalala. Equals. Then the new problem.

Pam and Kim  2:05  
Yeah.

Pam  2:06  
Alright, what do you got? 

Kim  2:12  
Did you give us an answer? 

Pam  2:18  
11,649 not 9,649. 

Kim  2:18  
Awesome. You know what I love? I love that you have played I Have, You Need enough that you look at those numbers, and you know exactly what the partner is to get to that 13,000. Well done.

Pam  2:24  
I love that as well. 

Kim  2:25  
Well done.

Pam  2:25  
Thank you for letting me know that was a thing to do.

Kim  2:27  
Yeah, absolutely. Okay, so I wanted to subtract a friendly number, so I thought about Over for this one. And I thought, I might as well subtract 13,000, same friendly as you had. So, once I subtracted 13,000, I had 11,524. And then I added back that same 125 and got 11,649. 

Pam  2:49  
Bam. 

Kim  2:50  
I sense some trends emerging. We have some maybe favorite subtraction strategies. But we have the ability to do both, so... 

Pam  2:58  
Especially

Pam  2:59  
when that that second number, which I'm sure has a name. Is that minuend? Subtrahend? It's one of the two. When that second number is really close to a nice number. 

Kim  3:06  
Yeah.

Pam  3:07  
It's very nice to either subtract Over or find the difference between them and then shift it somewhere, Constant difference.

Pam  3:14  
Yeah, nice. 

Kim  3:14  
Okay. Well, every week we cannot wait to see what you do. I hang out there to check it out. Join us on MathStratChat and let us know how you think about the problems and comment on each other's strategies.

Pam  3:24  
Yeah, thanks for doing that. Y'all, we post the problems on Wednesdays around 7:00 p.m. central. When you answer, tag me and use the hashtag MathStratChat. Then join us to hear how we're thinking about the problem. We love having you as part of the Math is Figure-Out-Able movement. Math is Figure-Out-Able!