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Math Rocks
January 5, 2016 at 10:57 pm (UTC 0) Link to this comment
How do you do a problem where x base 2 minus y base 2 =____ base 2, or 1011 base 2 – 1001 base 2= ___ base 2? I saw something in this format on the number sense TMSCA quiz. thanks
anthony gillespey
January 16, 2016 at 3:54 am (UTC 0) Link to this comment
Just remember the rules of math still apply. In base two you need to carry when you make 2. Subtract borrow 2 etc.
noah
November 1, 2018 at 9:53 pm (UTC 0) Link to this comment
is there a calculator book
anthony gillespey
November 8, 2018 at 6:48 pm (UTC 0) Link to this comment
Not yet but one day there might be.
Math Rocks
February 24, 2017 at 7:48 pm (UTC 0) Link to this comment
Hi Mr, Gillespy,
I understand how to find IF a number is divisible by 11, but how do you know how much remainder a number divided by 11 has? For example, 4273 divided by 11.
anthony gillespey
March 21, 2017 at 10:00 pm (UTC 0) Link to this comment
I am re writting my book this summer and I have a better method. Basically start with the far right number and do this. 3 – 7 + 2 – 4 = -9 if the number you get is positive thats the remainder. If its negative subtract it from 11 so in this case the answers remainder 2.
_mAtH
February 16, 2019 at 12:28 am (UTC 0) Link to this comment
Does this trick only work for dividing by 11?
anthony gillespey
May 22, 2019 at 3:47 pm (UTC 0) Link to this comment
You could make new tricks with other numbers but this is for 11’s
Number Sense Rocks
November 22, 2017 at 11:15 pm (UTC 0) Link to this comment
Hi there
Even though you can kind of do these kind of problems in your head, I wanted to know if there is a faster way to do a problem like 12 1/2 x 88 or something like that. Would it be divide it by 88 by 8 and add 2 zeroes?
Thanks
anthony gillespey
August 28, 2018 at 4:39 pm (UTC 0) Link to this comment
Yep exactly .