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Area Model 2 Digit x 2 Digit

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Here is a mini lesson on the area model for multiplication 2 digit by 2 digit numbers.

Show Transcript

hi everyone I'm here to show you how to be the area model strategy that you'll see on your homework and practicing a few times in the classroom so I'm going to go ahead and work on the Whiteboard here and sort of walking through the area it's basically the concept of area where you're doing doing it to multiply times 17 just start we need to make sure that we're breaking up our two numbers into tens place in one place and then tens and ones we were putting them into expanded form for 10 * R 10 + disease are first because we need to I know there's a little bit of glue to make sure that we have the numbers in order to plug into our area model the numbers that you have so in this case we're going to take the first number the number that we're putting on this side of our area model height is going to be 30 for now because he's are in two different place values we need to make a division of the box how to keep organized into two different Place Value Place top of the box for 17 number one place are two digit by two digit number in a multiplication table where you have a number on this side and never on the answer in the middle very much exactly like our traditional multiplication table many of your Scholars have already come up with the strategy of looking to their 10th place and when I like to do is I like to underline that then what I like to do what they've been practicing underneath all of the zero that they see because it's being used to zeros are going to event rent or basically they're going to transfer into our new number because that's what is 0 is it's not a number it's actually a place value holder so and 3 * 1 we have 3 but I'm 30 * 10 we have to place value holders which gives us the answer of 300 now we're going to do is going to take our 37 and bring it over here now I have that I know I can work with A3 I know the glare is a little off R3 and R7 so I know three groups so I can figure out three groups of 7 is just like saying 7 plus this is where multiplication fact really really help and if you're practicing anything at home or if you have some extra time please just make sure you're practicing your multiplication facts cuz it really helps that quick quick quick math the three-time seven or three groups of seven which is my zero I need to make sure I still have my place value holders in my final answer 30 groups going to the bottom part of our area model if not making sure they have that four times one with your place value holder right there as 40 my last box is 4 groups of 7 this is where having a multiplication facts is really really helpful but if you don't then you're just adding 7 4 times cuz it's for you might see colors over your scholar on the back of hair homework maybe right here and there my work which should have something in it they might have 7 + 7 to figure out that it's 28 so now we have all of our answers organ take our answers and one has circles at the end I know this seems like a very long way around answer really helps is understanding the steps even though we can do a standard algorithm where we stack and we have a place value holder and we are making sure we're crossing and multiply it really is a better visual of what ends up happening to visual and put it into the guys are always pretty used to do it because your scholar comes home and trust me I know what it feels like cuz I was in the same book but this is what we're doing right now so please stick with it you have 300 don't forget the check cuz I have a lot of times were Scholars will forget to write one of these or the right one twice and then we'll have 300 + 300 answer 40 check making sure that we're keeping all place values align right side you can choose to group it however you want if you like to do the standard algorithm so your answer should be to your area model 500 will be the house a little bit and that gets you started or at least get you understanding what it is that we're doing inside

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Area Model 2 Digit x 2 Digit

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