Rocks Brought Them Together

I had a good time spying on the boys yesterday afternoon. They are just so adorable. I caught them sitting on the ledge in our backyard throwing rocks at the fence.


Zooming in, you can catch their personalities as they're about to throw the rocks...
Sam taste-tests each rock before it goes overboard and Aiden selects the perfect rock with his tongs he grabbed from the kitchen drawer.



And into the pit they go!! I don't know how long they were out there doing this before I caught them, but it had to be about 20 minutes or so.
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Comments

Liza said…
So cute to see them playing together!!
Liza said…
Oh yeah, almost forgot, I wanted to ask you a math question. Have you heard of Singapore Math? I was reading an article about it yesterday and it had this problem that I could not for the life of my figure out how to solve. Can you help/ (Really just for my own curiosity)

"Mrs. Chen made some tarts. She sold 3/5 of them in the morning and 1/4 of the remainder in the afternoon. If she sold 200 more tarts in the morning than in the afternoon, how many tarts did she make?" (The article said it was a fifth grade problem) I know the answer from the article, but I kind of want to see the steps to GET the answer...Just if you have time, I know you are a busy mama!

I'm a nerd, I know, but I have to know this! It's been bugging me.
Rexicus said…
This comment has been removed by the author.
Rexicus said…
I just tried this and found an error, so I'm trying again:

I know I'm not Edda, but I wanted to try and solve this just for kicks. This probably scares people because it has fractions. Did you know that four out of three Americans struggle with fractions?

Let the total number of tarts = x.

Tarts sold in the morning:
m = 3/5 * x

Afternoon tarts:
a = 2/5 * 1/4 * x = 1/10 * x
(remember that is is a quarter of the remainder, not the total)

She sold 200 more in the morning, so we need to subtract the morning amount for them to be equal.

m - 200 = a

3/5 * x - 200 = 1/10 * x
(Move the 200 to the right)

3/5 * x = 1/10 * x + 200
(Subtract 1/10 * x from both sides)

1/2 * x = 200
(Multiply by 2)

x = 400

Did I get it right?
Liza said…
You did get it right!! You are awesome. Thanks for showing your work too, that was the part I was trying to figure out. Math is not my strong suit....
Liza said…
oh and I did catch your little fractions joke ;) According to the article, a lot of people could not solve this problem at all! The math concept I forgot was giving each one of the unknowns a variable...I tried to just use x for the unknown answer and that did not work. Thanks for helping me educate myself!
Michelle said…
Too cute! Matthew would LOVE playing with them, he loves to throw rocks too. :)

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