RoachStacie Podcast

Stacy Roach explains how to do multiplication with two-digit numbers using the area model. She suggests breaking down the numbers into tens and ones and drawing a rectangle divided into four boxes. The example given is 12 times 12. The tens and ones are written above the boxes, and the multiplication is done for each box. Finally, the numbers in the boxes are added up to get the final product of 144. Hi everyone, this is Stacy Roach, the host of your 4th grade math tutorial. Welcome. If you're like me, you've probably tried to help your kids with their math homework only to hear, that's not how my teacher showed us. So I'm here today to explain how to do multiplication two digit by two digit numbers using the area model. What you will need to do first is draw a rectangle and divide it horizontally and vertically into four boxes. Now the way it's introduced in class today was by breaking apart the numbers into tens and ones. For example, the math problem that you'll see on your child's homework today, the first problem was twelve times twelve. So they were told to draw a box and divide it into four squares. On the outside, twelve would break down into ten above the first two boxes and then they would write a two above the second two boxes across the top horizontally. The second number, twelve also, would break apart into ten and two. So the ten, you would write a ten vertically along the first row and then directly below that would be a two along the second row. Now what you would need to do, the first box in the upper left hand corner would be ten times ten, which is a hundred. So they would write a hundred in the first box in the upper left. Now going straight across, the box in the upper right would be ten times two, which was twenty. You would then move down to the bottom two boxes and the first box in the bottom left would be two times ten, which is twenty. You would then multiply the two on the bottom times the two in the upper right, which would make four in your bottom right hand corner. So your four boxes going from the upper left would be one hundred, the upper right box would be twenty, the bottom left box would be twenty, and the bottom right box would be four. So you're finished with the multiplication steps and now to get the final product of twelve times twelve, you would just add the four boxes. So it would be one hundred, plus twenty, plus twenty, plus four, for a final product of one hundred and forty-four. And that would be how you would figure out twelve times twelve using the area model. Go to Beadaholique.com for all of your beading supply needs!