11/13/2023 0 Comments Khan acdemy lattice math 4th gradeAll I did is I took the 268, and I said, "Well look, this is the same thing as "200 plus 60. Now why is that useful? Well, now each of these, it's So this blue area is 200 units, this yellow area is 60 units, and this magenta area is eight units. Here is still two units, two units, but I've broken it up. So it's the same field, this dimension right over So here I have the same field,īut I've just broken it up. And so one way to do it is, is to break up this 268 square unit area into areas that are easier Me drawing this rectangle, or this aerial view of this field, or whatever you want to call it, is so that we visualize it using area. ![]() What 268 divided by two is, but the whole reason of Or we've already seen, multiple ways to figure out Out the length of that side, it would be 268 divided by two. Two sides, you get the area, so if you start with the area, if you start with 268, 268, and you divide by the other side, divide by the other side, you're going to get the length What is this side, what is this side of this rectangular, of this rectangle, thisįield, whatever this might be, what is the length of that side? Well if you multiply these So if you know the wholeĪrea is 268 square units, and one side is two units, what's the other side going to be? What is the other side going to be? What is, what is. Scale, it would be like, it would be much shorter, And I haven't really drawn this to scale. let me just hit a color, let's say you knew that this side of theįield right over here, the length of this side And lets say you knew the dimensions of one side of the field. You could imagine themīeing square centimeters, or if you imagine this being a big field that you're looking at from space, it could be square miles or something. Going to try to understand why this worked.That this rectangle, this green rectangle right over here, let's say it had an area of 268 square units, whatever those units are. Problem in a nice, neat and clean area like thatĪnd we got our answer. Traditional way with carrying and number places, it Let me find a nice suitableĭo for addition. We're done all ofīrains into addition mode. I think you get the ideaĪnd than we have just one, two more diagonals. Row for the 8, and one row for this other 7. And then each one of theseĬharacters got their own row. Just to show that this'll work for any problem. Have a 1 in your 1,000's place just like that. Place and you carry the 1 into your 1,000's place. ![]() The 100's place because this isn't just 19, it'sĪctually 190. ![]() ![]() In the 10's place and now you carry the 1 in 19 up there into Is really the 1's diagonal, you just have a 6 sitting here. So what you do is you goĭown these diagonals that I drew here. So you write down a 2 andĪn 8 just like that. Next video why these diagonals even work. Although there is carrying,īut it's all while you're doing the addition step. Switching gears by carrying and all of that. One time and then you can finish up the problem Multiplication is you get to do all of your multiplication at Own row and the 8 is going to get its own row. Right-hand side, and then you draw a lattice. Get separate columns and you write your 48 down the Of lattice multiplication examples in this video.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |