Dan Romero pfp
Dan Romero
@dwr.eth
How does the German method work? 25 * 65 = 1,625 25 65 5 * 5 = 25 (2 * 6) + 5 = 17 1,725 What am I missing?
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itslemon.eth 🎩 pfp
itslemon.eth 🎩
@itslemon.eth
You make this 35×76 and it also doesn't work. 35 76 5x6=30 (3x7)+6= 27 2730
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dusan.framedl.eth pfp
dusan.framedl.eth
@ds8
generally it doesn't, given two double digit integers ab and cd, this method works only when 10*d = c*(a + b)
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Duraa pfp
Duraa
@duraa.eth
5*5 =25 3*7 +5 = 26 Simple
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Vladyslav Dalechyn pfp
Vladyslav Dalechyn
@dalechyn.eth
my method (ukrainian): 25 * (70-5) = = 25 * (4 * 20 - 10 - 5) = // writing as i think through =100 * 20 - 250 - 25 = = 1750 - 25 = 1725
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dawufi pfp
dawufi
@dawufi
i think its (3*7)+5 = 26 ? no idea why though
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Mac Budkowski ᵏ pfp
Mac Budkowski ᵏ
@macbudkowski
cc @timdaub.eth
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Mohsin pfp
Mohsin
@mnsis.eth
The issue was writing 17 instead of 42, correct result is 25 * 65 = 1625.
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Vladyslav Dalechyn pfp
Vladyslav Dalechyn
@dalechyn.eth
our schools teach us the "Iranian" method though.
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Chinmay 🕹️🍿 pfp
Chinmay 🕹️🍿
@chinmay.eth
Here is a more consistent method https://youtu.be/wP4vOS4SmYA
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ciefa 🐌 eth/acc pfp
ciefa 🐌 eth/acc
@ciefa.eth
I'm German and I have no idea wtf he is doing
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Anand ആനന്ദ്🦉 pfp
Anand ആനന്ദ്🦉
@bombaymalayali
Don’t think the German method shown here works in general. This is how I’ve been doing it since school 25 65 a) 5*5 = 25, last digit of the answer 5, carry 2 b) (2*5)+(5*6)= 40, add 2 carried, 42. Next digit to the left 2, carry 4 c) 2*6 = 12, add carried 4, last digits to the left 16. Answer: 1625
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jim pfp
jim
@mcpherson.eth
This only works with numbers both ending in 5, right? Change it to: 35 x 79 --------- 5 * 9 = 45 (3 * 7) + 9 = 30 3045 is ... incorrect. 🤨 How do you get to the correct answer (2765) using German method?
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May pfp
May
@golludou
Pure coincidence that 35 75 works…
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readyset.liqd pfp
readyset.liqd
@readysetliqd
I'd just times 65 by a hundred and do a quick lil divide by 2 twice in my head with these numbers. Call it the liquidated method
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Kiyoung's world pfp
Kiyoung's world
@ssuuwh47
@juhopapa @beneto @midhat @ssuuwh47 @poke00
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Ida Belle 🟪 pfp
Ida Belle 🟪
@ida
The sense of humor of the person who came up with this to troll the internet is admirable.
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pikachu⚡️ pfp
pikachu⚡️
@thxpikachu
he’s doing 5 x 5 = 25 3 x (7+5) = 26 but I think it works only for specific cases, it’s not a standard rule that you can apply to any multiplication
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Yusuff pfp
Yusuff
@hysolac
$FCKN cool
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Marcel🔵 pfp
Marcel🔵
@4cademy.eth
As a German I can confirm that the left one is not the "german method". We lern it exactly the way that the Iranian is doing it
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