Dec 6

How to multiply 2 digit numbers numbers up to 100 – the fast way!
Using this method you will be able to multiply any pair of two digit numbers faster than a calculator! Become a math genius in no time at all!

Duration : 0:6:27

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Dec 5

The original steps are 1.To find the LCD(least common denominator) 2.Multiply both sides by the LCD 3.Simplify and 4.Solve. I have trouble multiplying and simplifying polynomials and trinomials. I tried one problem using cross multiplication and it worked but I don’t know if this is an absolute way to solve the equations. Please help if you understand this? >.< No rude comments please

Right, so you need to be able to solve, for example, x/12-1/3+1/2x=0. It makes things easier if we multiply up both sides of the equation to get rid of the fractions (although it’s not strictly necessary to do so). The least common denominator is just the smallest number (or algebraic expression, as in this case) we can use to achieve this. In any case, multiplying both sides by all of the product of the denominators will do fine as well. In this case, that would mean multiplying both sides by 36x (=12*3*x). However, 12x will be the LCD. If we use this, the equation becomes 12x(x/12-1/3+1/x)=0 and this simplifies to x^2-4x+12=0, which can be solved by factorisation.

The only problem with cross multiplication arises when we have a variable in the denominator and an inequality. This is because if we multiply by the variable (eg x, as in the equation mentioned) we don’t know whether we are multiplying by a positive or a negative number. As far as I know, we then have to consider both possibilities separately.

So if we have x/12-1/3+1/x<0, then, assuming x is positive, 12x(x/12-1/3+1/x)<0 and x^2-4x+12<0. After factorising the left hand side, we know that we must have one positive and one negative factor in order to get the required negative value and this is only possible when -2<x<6. But since this is based on the assumption that x is positive, we can only infer that 0<x<6 satisfies the inequality.

Assuming instead that x is negative gives us 12x(x/12-1/3+1/x)>0 (because the greater of the two sides will (in any case) have become the lesser after we multiply both by a negative number), so that x^2-4x+12>0. This leads to the factors having to have the same sign, which is only possible when x>6 or x<-2. But like before, since we assumed that x was negative (this time) we can only infer that x<-2 satisfies the inequality (ie, is true given that the inequality is true).

The final possibility to consider is that x is zero, but since this results in 1/0 within the left hand side of the original inequality, is cannot satisfy it. Hence, we can conclude that either 0<x<6 or x<-2.

Dec 4

How to multiply 2 digit numbers numbers up to 100 – calculating the fast way!
Using this method you will be able to multiply any pair of two digit numbers with each other – faster than a calculator! Become a math genius in no time at all using vedic math!

Duration : 0:6:27

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Nov 27

Does the beat make a difference? Could your child relate to the lyrical content? Was it a video, could they relate to the people in it, did they sing it outside of watching the video, were there other instructions for written lessons or activities? Give me any information on experiences with multiplication raps.

I think that music helps students remember things better. It doesn’t have to be rap. I use Schoolhouse Rock songs as well. The theory being is that children remember the words to the songs that they hear on the radio, so why not their multiplication facts.

Nov 27

This video covers the process used to multiply and divide both fractions and mixed numbers. It includes four examples.

Duration : 0:8:42

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Nov 25

I need a C program for the following two using recursion
a)printing the multiplication table of a no and b)ncr
Please Help me

int NCR(int n, int r)
{
if(r==1) return 1;
else
return ((n-r+1)/r*NCR(n, r-1));
}

MULT(int n, int i)
{
if(i>1) MULT(n, i-1);
printf("%d %d =%f\n", n, i, n*i)
}
main()
{
MULT(7, 20) to print 7th multiplication table
NCR(5,3) to calculate 5c3
}

Nov 23

Schoolhouse Rock was the creative work of David McCall and was originally broadcast on ABC television beginning in 1973.

These episodes used to play on Saturday mornings. The originals were a big part of my growing up, and so I have fond memories of the animation and songs. Hope you enjoy them, too 🙂

1. My Hero, Zero
2. Elementary, My Dear
3. Three is a Magic Number
4. The Four-Legged Zoo
5. Ready or Not, Here I Come
6. I Got Six
7. Lucky Seven Sampson
8. Figure Eight
9. Naughty Number Nine
10. Good Eleven
11. Little Twelve Toes

Duration : 0:33:25

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Nov 21

This question was on my test and I wanted to know if I got it right. The question was: True or false, an opening or closing parenthesis can be used to indicate multiplication. I guessed and put down false. Which is it, and if it is false, why? Thank you!

true

you can put a variable next to a number to indicate multiplication, such as 5a
it is the same thing as that, except you are using a number instead of a variable

say 5(5) was the multiplication problem
it could be written as 5 x 5 or 5(5).. same thing, it doesnt make a difference,

Nov 21

There was a song I used to hear in grade school that was about an Eskimo, and it was used to learn multiplication tables. All I remember is that it was a male singer. Anyone know this song, and where I can find it so that my kids can hear it?

I don’t know it, but I found this album : Jiminy Cricket & Rica Moore – Multiplication And Division

Tracklisting:
A1 Multiplication
A2 Rabbits Times Rabbits
A3 The Latino Eskimo (Table Of Threes)
A4 The Multiple Waltz (Table Of Fours)
A5 The Switch-Hitch (Mixed Combinations)
B1 Divison
B2 Gazinta (Dividing By Two)
B3 The Division Riffle (Dividing By Three)
B4 Go To The Top Of The Class (Dividing By Four)

I found this listed at :
http://www.discogs.com/release/394363

I could not find lyrics

Nov 19

Multiplication and division are done with both decimal and fractional forms what are some advantage and disadvantages of each.

Well, when you do a multiplication with a fraction, you just have to multiply the numerator and the denominator with the number you are multiplying by but in decimals, you actually have to multiply it vertically and put the decimal point in the right place and everything… so personally, I think it’s easier to do fraction multiplication than a decimal multiplication.. and same with division… fraction division is just like fraction multiplication except you have to flip the numerator and the denominator before you multiply it and decimal division is definitely more complicated than fraction multiplication, so I think fraction multiplication and division is much more easier than decimals.

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