# Pages 5 through 25Pages 47 through 65

## Pg 26 – Approximating multiplying by 142857 Pg 27 – Multiplying by 3367 Pg 28 – Multiplying by 143 Pg 29 – Add to 1 Mixed NumbersPg 30 – Difference of Two SquaresPg 31 – Sum of Two SquaresPg 32 – Greatest Common FactorPg 33 – Least Common Multiple Pg 34 – Multiplying a x a/bPg 35 – Multiplying Mixed Numbers with Same FractionsPg 36 – Multiplying Mixed Numbers with Different FractionsPg 37 – Converting Mixed Numbers Percents to fractions Pg 38 – Adding inverse fractionsPg 39 – Adding consecutive IntegersPg 40 – Divisibility RulesPg 41 – Multiplying a whole number by a mixed numberPg 42 – Union/Non-UnionPg 43 – Set TheoryPg 44 – Base b to Base 10Pg 45 – Base 10 to Base bPg 46 – Determining the Base of a Number

1. ##### Math Rocks

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

1. ##### anthony gillespey

Just remember the rules of math still apply. In base two you need to carry when you make 2. Subtract borrow 2 etc.

1. ##### noah

is there a calculator book

1. ##### anthony gillespey

Not yet but one day there might be.

2. ##### Math Rocks

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.

1. ##### anthony gillespey

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.

1. ##### _mAtH

Does this trick only work for dividing by 11?

1. ##### anthony gillespey

You could make new tricks with other numbers but this is for 11’s

3. ##### Number Sense Rocks

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

1. ##### anthony gillespey

Yep exactly .

4. ##### Awesome

Is there a trick for 7 1/3 * 14 1/3

1. ##### anthony gillespey

Yep book one has this information.

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