↑ Return to Number Sense Video Lessons

↑ Return to Number Sense Video Lessons

Pages 47 through 65

Pg 27 – Multiplying by 3367

Pg 28 – Multiplying by 143

Pg 29 – Add to 1 Mixed Numbers

Pg 30 – Difference of Two Squares

Pg 31 – Sum of Two Squares

Pg 32 – Greatest Common Factor

Pg 33 – Least Common Multiple

Pg 34 – Multiplying a x a/b

Pg 35 – Multiplying Mixed Numbers with Same Fractions

Pg 36 – Multiplying Mixed Numbers with Different Fractions

Pg 37 – Converting Mixed Numbers Percents to fractions

Pg 38 – Adding inverse fractions

Pg 39 – Adding consecutive Integers

Pg 40 – Divisibility Rules

Pg 41 – Multiplying a whole number by a mixed number

Pg 42 – Union/Non-Union

Pg 43 – Set Theory

Pg 44 – Base b to Base 10

Pg 45 – Base 10 to Base b

Pg 46 – Determining the Base of a Number

## 10 comments

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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 .