Take a Penny

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“Take a Penny”:

“Take a Penny” You will never subtract the same way again! © 2012 Elizabeth Hill:Tricks of the Trade

“Take a Penny”:

“Take a Penny” We can use “Take a Penny” to make subtracting across zeros simple! © 2012 Elizabeth Hill:Tricks of the Trade

“Take a Penny”:

“Take a Penny” Using take a penny takes this many step process… © 2012 Elizabeth Hill:Tricks of the Trade

“Take a Penny”:

“Take a Penny” …To this 2 step process Do you notice something? NO REGROUPING!!! -1 -1 3999 - 2895 1104 © 2012 Elizabeth Hill:Tricks of the Trade

First Things First:

First Things First Let’s practice literally taking a penny! $0.10 How much is a dime worth? If you take a penny from a dime, how much do you have now? $0.09 © 2012 Elizabeth Hill:Tricks of the Trade

Let’s Try It Again:

Let’s Try It Again Let’s take a penny away! If you take a penny from a dollar, how much do you have now? $0.99 © 2012 Elizabeth Hill:Tricks of the Trade

How About This One?:

How About This One? Take a penny away! If you take a penny from five dollars, how much do you have now? $4.99 © 2012 Elizabeth Hill:Tricks of the Trade

Do You Have It?:

Do You Have It? T ake a penny! If you take a penny from ten dollars, how much do you have now? $9.99 © 2012 Elizabeth Hill:Tricks of the Trade

One More Time:

One More Time T ake a penny! If you take a penny from twenty dollars, how much do you have now? $19.99 © 2012 Elizabeth Hill:Tricks of the Trade

TAKE A PENNY:

TAKE A PENNY Let’s try the same concept a little differently! “Take a Penny” from 10 & it becomes 9 “Take a Penny” from 20 & it becomes 19 “Take a Penny” from 30 & it becomes 29 “Take a Penny” from 40 & it becomes 39 © 2012 Elizabeth Hill:Tricks of the Trade

Your Turn:

Your Turn See if you can “Take a Penny” with your partner. “Take a Penny” from 60 & it becomes 59 “Take a Penny” from 100 & it becomes 99 “Take a Penny” from 200 & it becomes 199 “Take a Penny” from 500 & it becomes 499 © 2012 Elizabeth Hill:Tricks of the Trade

“Take a Penny” Subtraction:

“Take a Penny” Subtraction Here is How it Works 300 - 245 -1 299 -1 - 244 5 5 Need to regroup across zeros? You need to “Take a Penny” . You need to be fair to the bottom number by doing the same to it. Now you can subtract without regrouping! © 2012 Elizabeth Hill:Tricks of the Trade

“Take a Penny” Subtraction:

“Take a Penny” Subtraction Let’s Try It Together 5 0 - 28 -1 4 9 -1 - 27 2 2 Need to regroup across zeros? You need to “Take a Penny” . You need to be fair to the bottom number by doing the same to it. Now you can subtract without regrouping! © 2012 Elizabeth Hill:Tricks of the Trade

“Take a Penny” Subtraction:

“Take a Penny” Subtraction Let’s Do Another One 80 - 36 -1 79 -1 - 35 4 4 Need to regroup across zeros? You need to “Take a Penny” . You need to be fair to the bottom number by doing the same to it. Now you can subtract without regrouping! © 2012 Elizabeth Hill:Tricks of the Trade

“Take a Penny” Subtraction:

“Take a Penny” Subtraction Try It With Your Partner 7 0 - 54 -1 6 9 -1 - 53 6 1 Need to regroup across zeros? You need to “Take a Penny” . You need to be fair to the bottom number by doing the same to it. Now you can subtract without regrouping! © 2012 Elizabeth Hill:Tricks of the Trade

“Take a Penny” Subtraction:

“Take a Penny” Subtraction Let’s Make It Harder 700 - 437 -1 699 -1 - 436 3 6 Need to regroup across zeros? You need to “Take a Penny” . You need to be fair to the bottom number by doing the same to it. Now you can subtract without regrouping! 2 © 2012 Elizabeth Hill:Tricks of the Trade

“Take a Penny” Subtraction:

“Take a Penny” Subtraction Let’s Try Another One 8 00 - 547 -1 799 -1 - 546 3 5 Need to regroup across zeros? You need to “Take a Penny” . You need to be fair to the bottom number by doing the same to it. Now you can subtract without regrouping! 2 © 2012 Elizabeth Hill:Tricks of the Trade

“Take a Penny” Subtraction:

“Take a Penny” Subtraction Try It With Your Partner 4 00 - 196 -1 399 -1 - 195 4 0 Need to regroup across zeros? You need to “Take a Penny” . You need to be fair to the bottom number by doing the same to it. Now you can subtract without regrouping! 2 © 2012 Elizabeth Hill:Tricks of the Trade

“Take a Penny” Subtraction:

“Take a Penny” Subtraction Let’s Make It Harder 7000 - 4375 -1 6999 -1 - 4374 5 2 Need to regroup across zeros? You need to “Take a Penny” . You need to be fair to the bottom number by doing the same to it. Now you can subtract without regrouping! 6 2 © 2012 Elizabeth Hill:Tricks of the Trade

“Take a Penny” Subtraction:

“Take a Penny” Subtraction Let’s Try Another One 5 000 - 3958 -1 4 999 -1 - 3957 2 4 Need to regroup across zeros? You need to “Take a Penny” . You need to be fair to the bottom number by doing the same to it. Now you can subtract without regrouping! 0 1 © 2012 Elizabeth Hill:Tricks of the Trade

“Take a Penny” Subtraction:

“Take a Penny” Subtraction Try It With Your Partner 8000 - 6492 -1 7999 -1 - 6491 8 0 Need to regroup across zeros? You need to “Take a Penny” . You need to be fair to the bottom number by doing the same to it. Now you can subtract without regrouping! 5 1 © 2012 Elizabeth Hill:Tricks of the Trade

“Take a Penny” Subtraction:

“Take a Penny” Subtraction Challenge Yourself 80 - 64 7 0 - 38 40 - 17 6 00 - 342 800 - 475 5 00 - 286 9000 - 7538 4 000 - 1843 30000 - 28542 © 2012 Elizabeth Hill:Tricks of the Trade

PowerPoint Presentation:

Thank you for purchasing from Tricks of the Trade. I use this PowerPoint presentation in my classroom during my subtraction unit. The concept of “Take a Penny” works because when you take 1 from both numbers the distance or difference between the numbers stays the same. Once you teach your students how to use this strategy, they will never have trouble subtracting across zeros again! I use several games and other activities that you can find in my store in my TpT store. I also use several videos which you can see on my blog at http://tricksoftheteachingtrade.blogspot.com or “Like” my Facebook https://www.facebook.com/tricksoftheteachingtrade © 2012 Elizabeth Hill: Tricks of the Teaching Trade. All rights reserved. Purchase of this unit entitles the purchaser the right to reproduce the pages in limited quantities for classroom use only. Duplication for an entire school, an entire school system or commercial purposes is strictly forbidden without written permission from the publisher. Tricks of the Teaching Trade, 1109 Summerfield Dr. Cairo, GA 39828, http://tricksoftheteachingtrade.blogspot.com/ Copying any part of this product and placing it on the internet in any form (even a personal/classroom website) is strictly forbidden and is a violation of the Digital Millennium Copyright Act (DMCA). These items can be picked up in a google search and then shared worldwide for free.

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