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Started By
Message
Can you do multiplication in your head thru 12?
Posted on 2/13/19 at 10:10 pm
Posted on 2/13/19 at 10:10 pm
without having to stop and think about it or add in your head?
I have trouble with...
3 x 9
3 x 12
4 x 9
4 x 12
6 x 7
6 x 9
7 x 6
7 x 8
7 x 9
7 x 12
8 x 3
8 x 4
8 x 9
8 x 12
9 x 3
9 x 4
9 x 6
9 x 7
9 x 8
9 x 12
Damn I need to work on my 9's.
11 x 12
12 x 6
12 x 7
12 x 8
12 x 9
12 x 11
Remember, this is about knowing the answer without having to think about it. As soon as you say, 6 x 7 is ... and you don't recall the answer right away, write it down and post your trouble spots. From 1 x 1 thru 12 x 12.
I have trouble with...
3 x 9
3 x 12
4 x 9
4 x 12
6 x 7
6 x 9
7 x 6
7 x 8
7 x 9
7 x 12
8 x 3
8 x 4
8 x 9
8 x 12
9 x 3
9 x 4
9 x 6
9 x 7
9 x 8
9 x 12
Damn I need to work on my 9's.
11 x 12
12 x 6
12 x 7
12 x 8
12 x 9
12 x 11
Remember, this is about knowing the answer without having to think about it. As soon as you say, 6 x 7 is ... and you don't recall the answer right away, write it down and post your trouble spots. From 1 x 1 thru 12 x 12.
35
Posted on 2/13/19 at 10:11 pm to Langland
I can do it through 350.
Posted on 2/13/19 at 10:12 pm to Langland
yes
Posted on 2/13/19 at 10:12 pm to Langland
Yes.
Posted on 2/13/19 at 10:12 pm to Langland
I use excel for shite like that. I’m not in the 2nd grade
Posted on 2/13/19 at 10:13 pm to Langland
(no message)
This post was edited on 3/7/21 at 11:45 am
Posted on 2/13/19 at 10:13 pm to RummelTiger
Who doesn't know the fingers trick for 9 times tables?
Posted on 2/13/19 at 10:14 pm to Langland
we have Asians we pay to do this
Posted on 2/13/19 at 10:16 pm to Langland
9's are easy dummy. minus one and then add to nine.
WTF they teaching you dummies these days.
WTF they teaching you dummies these days.
Posted on 2/13/19 at 10:17 pm to Langland
Yes I can. You can learn to multiply large numbers quickly without any memorizing. I’m sure you can watch some YouTube videos that wlll help.
I do always double check myself with a calculator at work because I don’t want to kill people by doing math in my head.
I do always double check myself with a calculator at work because I don’t want to kill people by doing math in my head.
Posted on 2/13/19 at 10:17 pm to Langland
yes. I'm not taking your test, but it was drilled into my head when I was 10 and has lived there ever since.
Posted on 2/13/19 at 10:18 pm to Langland
I got vaccinated as a child so I can do any random numbers in my head with no problem.
Posted on 2/13/19 at 10:21 pm to Langland
My parents used flash cards on every family vacation drive until I had them all memorized... finished the set at age 30... come at me math wiz... I got chu
Posted on 2/13/19 at 10:22 pm to Langland
In 6th grade we had daily multiplication tables quizzes. Known them cold ever since. It boggles my mind that every high school graduate doesn’t have at least a decent working knowledge of basic math. I don’t mean people who have to think about it or add in their head - I mean people who couldn’t do it even if you gave them a calculator.
Posted on 2/13/19 at 10:22 pm to Langland
None of those should be tough unless you struggle with numbers
Posted on 2/13/19 at 10:23 pm to Langland
quote:
Damn I need to work on my 9's.
9s are one of the easiest to remember
Posted on 2/13/19 at 10:23 pm to Langland
quote:
9 x 3
9 x 4
9 x 6
9 x 7
9 x 8
9 x 12
Damn I need to work on my 9's.
9's are easy. Remember the answer will add up to nine, or is divisible by 9, such as,
9x4=36; 3+6=9
9x5=45; 4+5=9
9x6=54; 5+4=9
9x7=63; 6+3=9
9x8=72; 7+2=9
9x10=90; 9+0=9
9x11=99; 9+9=18; 1+8=9 or 18/9=2
9x12=108; 1+0+8=9
9x13=117 1+1+7=9
9x14=126 1+2+6=9
9x15=135; 1+3+5=9
9x16=144
9x17=153
9x18=162
9x19=171
9x20=180
9x21=189; 1+8+9=18 which is divisible by 9; 18/9=2
Posted on 2/13/19 at 10:24 pm to MrSpock
quote:
9's are easy dummy. minus one and then add to nine.
So you have to think about it and add? Then your answer is no.
Posted on 2/13/19 at 10:27 pm to Langland
Yes, damn son
Posted on 2/13/19 at 10:29 pm to Langland
Sure. If I have a calculator.
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