Can you tell me how to use the rule when 12 x 899 or 12 x 855? Im not fully understanding of what to do with numbers over 5 when doubling them adds up to 10 or more. Thank you in advance.
You will regroup/carry any tens place digit into the next place value to the left just like you do with normal addition: 12 x 855: 2 1 1 (Digits from the tens place regrouped/carried) 0 8 5 5 (Multiplicand) 1 0, 2 6 0 (Product)
Being that step number 1 is to add a zero to the left of the number being multiplied, the calculation goes as follows. 2 x 4 = 8 + its neighbor to the right which is zero = 8 which is the number all the way to the right in the ones column. Next is to double the next number so 2 x 0 = 0, + its neighbor to the right which is 4 = 4, which is placed in the tens column. Combined you have 48.
What happened to the ten you carried over from the first numbers added and placed a dot over the 4? After adding 4+4 =8 +7= 16... Carry the ten by placing a dot o'er the 6. 2+2=4+4=8 add the ten carried over the 6 and you get 9. At this point, I want to know what happened to the 10 that was from adding 7+7. Seems that first 10 disappeared.
It's a cool trick. I'm glad I didn't have to do this in school though. Straight math was tiring enough!
Cool teach me more about the Trachtenberg method
found yous series verry usefull thx
Website links not working, showing same pages when I click any link in this site, please help me
again, awesome
hey is there any easy way to remember tables
1*1-1*20
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.till
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20*1-20*20
Thanks dude, you are awesome!
sir kindly provide me the process of 17 multiplied by 6 as per the rule,, as cant realise it using the method..(by 6).
thanks, that's cool
Can you tell me how to use the rule when 12 x 899 or 12 x 855? Im not fully understanding of what to do with numbers over 5 when doubling them adds up to 10 or more. Thank you in advance.
You will regroup/carry any tens place digit into the next place value to the left just like you do with normal addition: 12 x 855:
2 1 1 (Digits from the tens place regrouped/carried)
0 8 5 5 (Multiplicand)
1 0, 2 6 0 (Product)
Thanks
oh I love it!!
why would 43 times 12 be 516, wouldn't it be 116 instead or am I forgetting to do something
I've trouble multiplying the term which has 5 at the end!
What if it is more rhan 20 such as 12×935. Do you add two dots?
yes
Only 4 parts seen in the list out of 9 parts.
thanks A Lot~
+Ronachelle Tongol You're welcome!
Ronac
@@TrachtenbergsystemOrg123 what about other methods sir, I am eagerly waiting for many years for the videos of other methods!
why is 12 x 4, 48?
12 plus 12 is 24, just add another 24 equals 48
Being that step number 1 is to add a zero to the left of the number being multiplied, the calculation goes as follows. 2 x 4 = 8 + its neighbor to the right which is zero = 8 which is the number all the way to the right in the ones column. Next is to double the next number so 2 x 0 = 0, + its neighbor to the right which is 4 = 4, which is placed in the tens column. Combined you have 48.
Follow the protocol, 4x2 + 0 = 8 so the rightmost number is 8, 0*2+4 is 4 so the next number is 4. 48 is your result
the smart kids in my school:so 3*2 is si-
me: imma stop you right there
I would be like: "since you're so smart, WHAT IS 243 TIMES 12"
What happened to the ten you carried over from the first numbers added and placed a dot over the 4? After adding 4+4 =8 +7= 16... Carry the ten by placing a dot o'er the 6. 2+2=4+4=8 add the ten carried over the 6 and you get 9. At this point, I want to know what happened to the 10 that was from adding 7+7. Seems that first 10 disappeared.
I used this in the 3rd grade and was failed because I didn't show HOW to get to the answer. Thankfully my parents took me out of school and we moved.
That's sad :((
stop sniffing thx
hahaha
*sniff*
Sorry.
Colin Anderson I hate you for saying that