surface area with fractions
Math
The surface area for Christmas and refrigerator in the previous problem
The surface area for Christmas and refrigerator in the previous problem tells us that the hype. 6 over three is the height and it has 15 over 18 deep. And four or 5 wide. What is the formula for surface area of a prism? And we can assume it's a prism, right? Because refrigerators, you know, are looking like prisms, right? That's what Richard looks like. So your children, what is the formula? That's the formula for. Oh, that's the formula for. That's the formula for light test on how to perform. Sometimes volume, yes, okay. So the formula for surface area of a prism, Victor Rohan times weird times height. No. Okay, Rohan. Okay, wait, I think I'll be wrong and say it's wrong, say it again. No. Two. And then parentheses length ties with. Plus two. Lifetimes high. Plus two. With time tight. All right, good. So the girls figured out, well, you were gonna say what you did. So anyways, let's move on. All right, but no, because you said life has worked with the two SV outside of it, the two comes first.
So we're gonna do substitution property now to work this out, you guys. So the length, now it doesn't say length of time, which has the width, right? And it says the height. So we're just going to then assume that maybe this guy's gonna be the length, the deep would be the length, okay? Who cares? Anyways, it really doesn't matter when you use this formula. The only thing that matters is you have three different combinations. Do you guys know that? Yeah. Okay. So we're gonna substitute 15. Yeah, well, not just three different numbers, but three different combinations times four over 5. And then this is going to be two, and then the length is going to be 15 over 18 times. What? About 6 over three. I thought you said you all want to follow along. Plus. And then four over 5. Times 15 over 18 takes over three. Oh. We already used the 15 over 18. The multiplying part is not the most challenging thing. Cross dividing as our friend, look at the 15 and the 5. Let's see if anyone can be alive. To a what? The 1582 O three. All right, what about the four? So that picture speak. And the 1820. Okay. So then this guy is going to be 6 overnight. All right, and now the two outside the parentheses really means what? What operation?
Time so then two times the whole number of refraction when you put the whole number one don't work for us division, of course. But we'll get to that later. All right, so then this guy, we can still cross divide, right? The 6 turns to a three. One? One. 18 turns two. Three. Three. Cross divide these guys three times two. One. 5. 5 over three. And then this will be also two over one, right? Okay, and then over here cross no cross divide. So we're kind of sad but no law. Is it going to be? 24 hours. Okay, and then the two is over one. Okay, so now I'm going to scroll down, don't mind me, look, I could just keep staying there. All right. So now we've got to do the two of one time there thing. Can't cross by the side is going to be 12 over 62. That's the one. Yeah, I know it's sloppy. It's okay. I'm a boy. And then 48. 15. Okay. Now adding factions is where you guys have trouble, right? We need to comment and I'm there. It's gone down to the spirit of south. So the 9 and the three and the 15 they had come to know there. But we're going to take it two at a time, right?
So this first to the first two. What would be a good common denominator between 9 and three? What could 9 and three both go into, Victor? 9 can't go into three. I mean, not. 9. So look, if we're going to make these 9, this guy's going to stay the same, right? This one, how did the three change the 9? To be fair, I must also do two. Multiply three over three on the top. So then this is now 30. All right, so this guy's now 42. 42 over and then 18. Stay the same. That's why I practice chicken. Now we're going to add it to the 40 over 15. Okay, so we need a common denominator with the 9 and the 15. 90. Now count off, head off by 15. 15. 90. 95. Right, 9 goes into 45 and 15 goes into 45, right? So then you can just go here and then this is multiplied times 5, a disabled 5 times no, this is time. Three. What do you guys think? All right, so you can turn it off. There's