Math Is Fun Forum

  Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ -¹ ² ³ °

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#6726 Re: Introductions » Greetings, one and all. » 2005-04-18 01:23:39

That is cool. You are Islanders of some sort ... palm trees, and all smile

(careful about your address, though, unless you want the whole world to come a'knocking)

#6727 Re: Maths Teaching Resources » Crazy Teachers » 2005-04-18 01:14:44

I knew a Mr Walker. But he ran a car repair business. Ironic.

#6728 Re: Guestbook » helooo » 2005-04-18 01:09:02

Yeah, franzak, cool it down a bit. There are people here.

#6729 Re: Guestbook » Loving it » 2005-04-18 01:03:46

Zach wrote:

9 times tables are rather simple. Take the number, times it by 10 and then minus the number.

Example: 6 times 9

Take 6, times it by 10 (60), then minus the 6 and you get 54.  6 x 9 = 54

Another example: 8 x 9 = 80-8 = 72.

#6730 Re: Help Me ! » mental maths » 2005-04-18 00:55:54

Zach is right.  It takes practice.

Buy one of those posters with the multiplication table and put it on your wall.

And go to these multiplication worksheets, and print out lots to practice on.

You'll get there !

#6731 Re: Guestbook » Doing Maths » 2005-04-17 09:57:00

That is true, Priya.

I also think that some people "fall off the maths road" at some point.

If they don't understand something one day, it becomes all confusing and they are lost from then on. If they went BACK and tried to build themselves up again, they might find it actually makes sense.

#6732 Re: Maths Teaching Resources » Crazy Teachers » 2005-04-17 09:50:05

That's good, stewie.

I had a teacher that would lie down on the floor, resting his head on his hand (like you might watch TV), and he would then tell us stuff.

We all had to look down and over each other to see him. And he didn't even notice how strange it was !

But, to be fair, there are some really good teachers too (right??)

#6734 Re: Jokes » The Duck » 2005-04-16 22:33:13

It will be stewie version 2.0

#6735 Re: Introductions » Greetings, one and all. » 2005-04-16 10:30:15

If he becomes President, would he be "President T" ?

#6736 Re: Introductions » every body .. come here » 2005-04-16 10:28:06

I think its the sugar they put in it.

#6738 Re: This is Cool » Can this be possible? » 2005-04-16 01:20:44

3. 1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679 etc

And a trillion more digits are apparently known so far !

Some people reckon there is a secret message from God in there somewhere, if only we knew how to work it out ...

#6742 Re: Guestbook » accounting » 2005-04-15 11:47:30

OK, your next "PUZZLE" says:

Start:           3y+4y=6+15.

Now, here is another thing you can do. By just thinking "I have 3 apples and 4 apples, so I must have 7 apples" you can take the first step:

Start:           3y+4y=6+15
Add 3y+4y:        7y=6+15

OK? 3 times something + 4 times something = 7 times something. Just remember, they must all be the same something, like "apples". You cant add apples to rocks, so you cant add "x" to "y"

AND you didn't have to do it to BOTH sides, because you were just RE-ARRANGING things on one side, not adding anything.

Now, the next step is easy, just add the 6 and 15 together:

Start:           3y+4y=6+15
Add 3y+4y:        7y=6+15
Add 6+15:          7y=21

And then we use our "you can divide so long as you do it to both sides" rule, so let's divide BOTH sides by 7

Start:           3y+4y=6+15
Add 3y+4y:        7y=6+15
Add 6+15:          7y=21
Divide by 7:          y=3          DONE !

It is just like a GAME or PUZZLE with rules.

#6743 Re: Guestbook » accounting » 2005-04-15 11:32:25

x, y, u and so on all mean "don't know it yet"

So "-6u=-30" means "-6 times something-I-dont-know-yet equals -30"

They want you to work out the "something-I-dont-know-yet" part

So, -6 times WHAT equals -30 ?? I can guess it is 5, because 6x5=30, but you aren't supposed to just GUESS, so there are some things you can do to get the right answer.

Think of it as a PUZZLE, that starts at "-6u=-30" and ends at "u=5", and the rules are:

* You can multiply or divide by anything so long as you do the SAME to both sides of the "="
* You can add        or subtract  anything so long as you do the SAME to both sides of the "="

So, here goes:

Start With:                         -6u = -30
Multiply BOTH sides by (-1):  6u = 30  (Read here about Multiplying Negatives)
Divide BOTH sides by 6:         u = 5  DONE

#6744 Re: Jokes » Jokes » 2005-04-15 10:41:21

"Missed her completely", so he stayed a bachelor?

#6745 Re: Puzzles and Games » How an Wine be poured? » 2005-04-15 10:20:45

No, someone is supposed to TOP that.

#6746 Re: Puzzles and Games » Good one for y'all » 2005-04-15 10:19:33

Perhaps you are going to say "I still have 4, just in two separate locations" ??

#6748 Re: Jokes » Another Blonde Joke » 2005-04-15 10:09:26

So, are blonde jokes "hairist" ?

#6749 Re: Jokes » Blondes don't do news. » 2005-04-15 10:05:38

Confirms a theory of mine.

#6750 Re: Jokes » Jokes » 2005-04-15 10:03:45

The Storm
by Harry Kane

The Bachelor
by Mister Completely

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