Melody

Why don't you try to work through the activities on this site.    

Good work Rosala  

Zegroes, I took points off you for being so lazy! You should have fixed your answer before you went to bed!   

I have interpreted this question differently.

Sheila has 32 coins all together.  They are all nickels 5c and dimes 10c.  There total value is $250

How many nickels does she have?

Let n be the number of nickels and let d be the number of dimes.

n+d=32      (1)

5n+10d=250    divide through by 5

n+2d=50    (2)

Solve equations 1 and 2 simultaneously.  Start with (2)-(1)

$$\begin{array}{rlll}
n+2d&=&50\quad&(2)\\
\underline{n+d}&=&\underline{32}\quad&(1) Now \;subtract\\
d&=&18}
\end{array}\\\\
\begin{array}{rlll}
n+18&=&32\;\; therefore\\
n&=&14
\end{array}\\$$

check   14+18=32 and  5*14+10*18=70+180=250=$250    correct

So Sheila has 14 nickels  

Thanks Alan,

I would look at it a little differently.

How many units are there in 75.    75 ofcourse.  75*1=75

How many hundreds are there in 1600   Well 16 of course  16*100=1600

How many thousands are there in 137000  .   Ans 137    :   137*1000=137000

How many tenths in 5.7  57 because 57*1/10=5.7  (note that the 7 is in the tenths column)    

Thanks Chris,  That is a really neat method!   Here is another method. 

Any number can be put over 1.  (If you divide any number by 1 its value does not change)  So

$$\\\frac{0.00365747}{1}=\frac{1}{x}\\\\
\mbox{Now you can turn both sides upside down (take the reciprocals)}\\\\
\frac{1}{0.00365747}=\frac{x}{1}\\\\
x=\frac{1}{0.00365747}\\\\$$

$${\frac{{\mathtt{1}}}{{\mathtt{0.003\: \!657\: \!47}}}} = {\mathtt{273.413\: \!042\: \!348\: \!946\: \!129\: \!4}}$$    

 I used the divide by sign to do this.   

Thanks Aziz,

Aziz has written an approximation.

$${\sqrt{{\mathtt{2}}}}$$    is an irrational number.  This means that it cannot be written exactly as a fraction. Hence it cannot be written exactly as a terminating or recurring decimal either!

Oh Squire Ninja of great stealth.

I am sure the Queen can rely upon your  loyalty.

 Thee must foil Sir CPhill's evil plot.

Thine reward shall be great.

A knight shall you be dubbed! 

Queen Guinevere.

What is 'not for long'?

Doth I detect a treasonous plot?

Tis it thou wish to destabilise Camelot?

Why would thou wish to do this evil?

Tell us Sir CPhiĺl, why would thou plot against thine Queen? 

Very clever Chris,

And Rosala,  I love all our rats!

(Chris says you have fleas Rosala - I really hope they aren't carrying the plague!)

If you were too good it would not be half as much fun.

(I still don't want to catch the black plague though and I wish DS would control his excessive posting!)

Good night to Chris and good night to all our 'rat pack'.

Upon the new day I shall return.

Queen Guinevere.

Sovereign of Camelot

Saying that you are good rats might be going a bit too far Rosala!   

BUT hopefully none of you is carrying any fleas that harbour the Black Plague!