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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
Just remember the rules of math still apply. In base two you need to carry when you make 2. Subtract borrow 2 etc.
is there a calculator book
Not yet but one day there might be.
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.
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.
Does this trick only work for dividing by 11?
You could make new tricks with other numbers but this is for 11’s
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?
Yep exactly .
Is there a trick for 7 1/3 * 14 1/3
Yep book one has this information.
Is there a trick for figuring out how many terms a sequence has?
For example, how many terms does the sequence 2, 5, 8, 11, ……., 152 have?
Yes its in the blue book
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