Convert any fraction to decimals with simple division. To donate to the tecmath channel:paypal.me/tecmath To support tecmath on Patreon: / tecmath To buy tecmath mechandise: teespring.com/stores/tecmath-...
In elementary school we did it top down and wasted a lot of trees doing so. I have never seen this elegant left to right division in over 30 years of math.
3 / 4 : to change any number divided by 4 to a decimal; multiply the number by 25 and move the decimal 2 places to the left 3 * 25 = 75.00 moving the decimal 2 places to the left gives 0.75
yes. to complete your answer, you dont always have to multiply by 25. it can be a different number. for example, you could've just multiplied by 1/4 (or divided by 4) to get 0.75/1. or you could just multiply by 2.5 (and get 7.5/10, which is still 0.75). despite all that, the method you use is more general, as more people find it as the easiest. A complete answer to your method can be proven algebrically: let x be 100/denominator (in this case 4, meaning x=100/4, or 25). multimply both the numerator and the denominator by x (25) and get 75/100 when you divide by 100, you just shift the number 2 spaces to the right, so you get 0.75/1, or just 0.75 as your answer. Another example: let's do 7/15 first, we'll use the general method: 100/15 = 6 and 2/3, or just 6.6 recurring. multimply both sides of the fraction by that and get 46.66.../100. when we divide by 100, we shift the number two squares to the right, so this becomes 46.66666..., and that is our answer. Now, doing that the calculator way, just type 7/15 and it'll give you the answer. there ya go
Relearning my math skills for my upcoming Asvab and you are making this easier than the first time in school! Amazing teaching ability. Watched two of your videos so far and I am very grateful. Thank you man!
You'd do 5)6 instead of 6)5 but the process would be the same. How many 5s are in 6? You have 1 with 1 remaining,. So, you'd have 1 as the first digit. Then as usual you put a decimal points, and add a 0 after the decimal point in the dividend (the number we are dividing), i.e. the 6, to get 6.0, and then put the remainder of 1 just above that 0. Then we carry on as normal. How many 5s are in 10? There's 2, with no remainder. Therefore, you have 6/5 = 1.2
Any number divided by 8 can be done by multiplying the number by 125 and moving the decimal 3 places to the left 3 / 8 = ? 3*125 = 375 So 3 / 8 = 0.375
Ya know?! This is the same as everyone I know has been taught in school. Granted, the format is modified so as to take up less space, but I don’t see an impact on the time it takes to perform the calculation. If people don’t do it as in this video (or with the alternate ~”drop down” format) then I would be interested in seeing their method.
The way you did 2/7 is a big fail. You had a chance to show that the decimal will eventually repeat, and with periodicity that is no more than value of denominator.
Exactly. He should have at least gone to 6 or 7 decimal places. Eventually you'd end up with 7)2.²0⁶0⁴0⁵0¹0³0(²0⁶0⁴0⁵0¹0³0...) on the bottom, and 0.285714(285714...) on the top.
If this is so easy and straight forward, why do they teach kids long-division? What's the benefit to that? 🤔 It's basically the same thing, but takes up more space and feels like a lot more work than this, which you can do in your head. 🤦
Or you can abandon the hopelessly outdated fractional based measurement system you insist on using and join the rest of the world. With the metric system, you never have to use fractions, only decimals.
"Metric" has nothing to do with "fractions" or a "lack of fractions". Let me demonstrate a very very scary concept. "1/4 kilgrams". Look... it's a metric unit.... and a fraction? WHAT?
