Ask Dr. Data A Question

Dr. Data needs more work, please ask him a question by making a comment in the comment section of this post.

Sincerely,
Dr. Data

Metric System

Earlier Cynde shared with the data team that her class was working on the metric system. We created a video on that subject. We hope it helps you class, Cynde.

Sincerely,
Dr. Data

Ask Dr. Data A Question

Dr. Data needs more work, please ask him a question by making a comment in the comment section of this post.

Marble Problems

We have finally solved the marble problem. Here is our data lab answer:

Since there are 3/5 marbles that are red. You must first find out how many blue and green marbles there are.

3/5 + ___ + ___ = 5/5
so
5/5 - 3/5 = 2/5
so
__ + ___ = 2/5

by looking at the last problem you can see that each of the blue and green marbles must equal 1/5 each for the total to be 5/5

Red 3/5 3/5 = ?/15 5*3=15 so 3*3=9 3/5 = 9/15
Blue 1/5 1/5 = ?/15 5*3=15 so 1*3=3 1/5 = 3/15
Green 1/5 1/5 = ?/15 5*3=15 so 1*3=3 1/5 = 3/15
= 5/5

So drawing a blue and red marble is 9/15 + 3/15 = 12/15 reduced is 4/5

So there is a 4 out of 5 chance that a blue and red marble will be drawn.

Dr. Data

Math Facts

Christy said...

How can you use technology to teach math facts?

Christy, we found some great sites for practicing math facts. We gave you our opinion on them, and we hope you enjoy them.

Sincerely,
Dr. Data

matching game
http://quizhub.com/quiz/f-multiplication.cfm

multiplication rock videos on youtube (search for the others; it looks like most of them are there)
http://www.youtube.com/watch?v=cwkgNf69ihY&feature=related

kidport 4th grade
http://www.kidport.com/grade4/math/NumberSense/G4-M-NS-Mult12.htm

Funbrain:
http://www.funbrain.com/tictactoe/index.html

Kidport 3rd grade
http://www.ixl.com/math/grade/third/

kidport 6th grade (really good stuff)
http://www.ixl.com/math/grade/sixth/

Math Trainer: 5 minute time test just press go
http://www.mathsisfun.com/numbers/math-trainer-multiply.html

johnnies math-really, really good
http://jmathpage.com/JIMSMultiplicationpage.html

Ask Dr. Data A Question

Dr. Data needs more work, please ask him a question by making a comment in the comment section of this post.

Thank you.

Baseball problem

Dr. Data got the above question several weeks ago. This one took us awhile to figure out, but we did it. Thanks for your post and challenging us.

Types of Triangles

Mrs. Altenburg said...

Could you explain the different types of triangles based on the number of sides and the types of angles.

Yes, Mrs. Altenbury,

We can answer that question for you. There are six different types of triangles. There is a right triangle, obtuse triangle, and acute triangle. They are different because of their angles. The right triangle has a 90 degree angle. The obtuse triangle is different because one angle is greater than 90 degrees. The acute triangle is smaller than 90 degrees and all the angles are smaller than 90 degrees. The other three triangles are Scalene, Isosceles and Equilateral. The Scalene triangle has no congruent sides. The equilateral triangle has all congruent sides, and the Isosceles triangle has two equal sides.

Working With Graphs

Cindy ask this question:

Hey Dr. Data,

My students have been working on coordinate graphs and converting in the metric system. Do you know of any good links I could tag for my students? Thank you for your help.

Well, Cindy,

We found some good links. One of our favorites is at http://jmathpage.com/JIMSGeometrypage.html scroll down to Cartesian Grids. By the way Johnnies Math page happens to be one of our favorite websites.

Your Friend,
Dr. Data

Esitmating

Anonymous ask Dr. Data the following question.

Dear Dr. Data,
Do you have any tricks for helping us estimate objects inside of a 3-dimensional object (for instance - how many balls are inside of the jar)?

Dear Anonymous,

Here is your answer: Let's say you want to estimate the number of gumballs in a jar. First, count the gumballs on the top layer of the jar. Then, count the number of gumball going up and down the length of the jar. Finally, multiple the top layer by the length of the gumballs. You have an estimate of how many gumballs are in the jar.

We hope the next time you have to make an estimate you get close!

Yours truly,
Dr. Data