I’ve been looking up different math youtubers for research on my own channel and glad I found your videos! Your explanations are so clear at at a good pace
Great video. Though you confirmed there’s other ways to do this sum, I would like to commend your explanation and method for doing the sun this particular way. You’ve got the teaching nack! Wish you were my maths teacher !
Yes! there may be different ways of working out the problem, but I really prefer this method. The method used brakes down the problem and refreshes your memory; just in case you forgot about equations or long divisions. Thanks, works for me, and many others.
Thank you so much for breaking this down so I could understand why you are doing every step. It really helps in creating a foundation for solving future problems. Subscribed!
Thank you so much. I have worked in hazardous materials response, explosives, inventory (of said explosives), and management. I'm really good at math usually, so good in fact, that i wrote an excel sheet that saved me hours a day for the inventory and management part of my explosives job. However, since i had all the numbers i never had to reverse proportions like this A&P class is asking me to do because i guess i just math'd my way around the holes in my knowledge. Watching this jogged my memory and now i'm smashing proportions with no problem. Still annoys me how static and inflexible school questions can be. They really don't allow you to think and this is why i struggled in school sometimes, but i always excel in the field.
Cross multiply and divide... I’m currently teaching my daughter a 6th grader who says my method is much easy and they get to the answer quicker. 45x100=4500 18/4500=250
Direct proportion, using a 2 row 2 column table makes it a very simple problem to explain in class. In first row: 45 next to 18 In 2nd row: x next to 100 (x the number we are looking for. Hence x/45 = 100/18 Hence x = 45 × 100/18 x = 250 A quick check: 0.18 × 250 = 45
This is really helpful, I didn't pass my math tests because of one problem... it say.. 5% of what number is 14.? Now because of you I understand that I miss that important 0 at the end. Thanks!
Try the fraction is over of and percent over 100. Every sentence has the word is and of in it. If there is a percent number write that over 100. If a number appears before the word is...u write that above the number that comes after of. Two numbers will be diagonal. Multiply those two and divide by the remaining number
Fundamentally the concept of part/whole is a sound one. As far as calculation is concerned no need to multiply 45 and 100. Rather break 18 into 9 and 2 so that 9 divides 45 and 2 divides 100. 50×5 is 250. Mentally we may do it quickly but fundamental principle is do-undo.
Shortcuts are cool but they really only work because there's an underlying appreciation for the long way. The people who are always belly aching about the long way of learning get on my nerves. Nothing is the short way. For example, we run in and grab something out of the store. But the manufacturer is rich because we "ain't got all day." The teacher here is like the manufacturer. She lays the foundation. Like what good is a house standing on a dirt floor? What good is a house of cards? Once you thoroughly get the concept, then you are free to use Shortcuts forever more. If you can't say something nice, move along. This teacher freely shared her knowledge. She didn't have to. She established a foundation so that the shortcut teacher will seem to be the hero. That shortcut only solves one style of the problems. You will still have to understand the rest of the techniques. I wouldn't want the shortcut guy as my accountant. I'd want the stickler. So. I celebrate this teacher. Thank you. We owe the world to "nerds," not to insulting jerks with half a brain. So, again, just saying, you are very appreciated. Party time to you. 😎
Will this work for every problem like that? I am asking this because, I’ve been using the multiplication. Say, 75% x 24. I would move the decimal for 75 and make it .75, multiply by 24 and I got 1800, which would just be 18 I believe and the answer was 32, when it told me to find what number that percentage went to. So, I began getting problems right and wrong, I need something that will always make it right. I then tried it in fraction way. . . 75/100x 24/1, or in the original problem, it would have been 24/1x75/100. But, I don’t know what it was but the answer was wrong frequently. And even if I did get it right, that would have been after hours of reducing. I can reduce, but I get so confused when it’s a big number. So basically, what I’m asking is: will this give me the correct answer everytime?
Appreciatable,I don't believe what you believes in math, because math is a confusing subject for a lot of people even for me, but I believe in you.yes you can.
i went to a private school the 3rd most expensive school in my country and was taught grade three level in the 5th grade I now go to a public school and learn on a shanghai level of mathematics (this is in south africa)
