Sunday, February 9, 2014
Decimals Games
Scooter Quest
Identify the correct place value.
Bubble Burst
This game deals with adding decimals.
Multiply and Divide by 10s
Practice this one before doing decimal division.
Decimal Division
This is practice for dividing decimals.
Snake Math: Basic Advanced
This is a classic game with math about fractions and decimals added to it. Advanced is faster than basic.
City Defense
This game involves adding, subtracting and multiplying decimals.
Sunday, February 2, 2014
Making Mistakes
You’re afraid of making mistakes. Don’t be. Mistakes can be profited by. Man, when I was young I shoved my ignorance in people’s faces. They beat me with sticks. By the time I was forty my blunt instrument had been honed to a fine cutting point for me. If you hide your ignorance, no one will hit you and you’ll never learn.- Ray Bradbury
Keep It Cloud It Junk It (Math Version)
A few weeks ago, Mrs. Parker demonstrated a reading strategy for us. I've been thinking about a way to change it into a math strategy and I think I've come up with it.
Her strategy was a focus question, then ideas would be set into 3 categories, 1 lead to group discussion, 1 was certain, and the other was extraneous information. So Cloud It, Keep It, Junk It. I think this might be applied to word problems like so: Solve It, Use It, Junk It.
Word problems typically have details about the problem and extra information in them just like reading a passage for a purpose.
So for example, look at the following question:
6. You can win $10 if you can successfully do one of the following given one shot:
I Roll a 6 on a single number cube
II Roll a sum of seven on two number cubes
III Roll a number greater than 4 on a single number cube
Which of these three choices should you have the best chance of getting the $10?
(note, I am not making this offer)
F. I only
G. II and III
H. III only
J. I, II, and III
There's a lot of information here. Let's split up these things into Solve It, Use It, Junk It.
Solve It Use It Junk It
P(6) best $10
P(sum 7) number cube win
P(5 & 6) one shot
sum
greater than
Remember that P(6) is shorthand for the probability of getting a 6. As you can see 3 things are in the solve it category.
The $10 is extra information and doesn't help you solve the problem, so is junked.
Then in Use It, we see that we want to compare the probabilities from the word "best", that they all involve number cubes because no other probability device was used, and that they are not multiple events (one shot). We also see the word sum (which means add) and greater than. These are details that modify the probability needed.
After that we solve it by creating ratios. P(6) = 1/6. P(sum 7) = 6/36 and P(5 & 6) = 1/3.
Might need to think about this some more.
Her strategy was a focus question, then ideas would be set into 3 categories, 1 lead to group discussion, 1 was certain, and the other was extraneous information. So Cloud It, Keep It, Junk It. I think this might be applied to word problems like so: Solve It, Use It, Junk It.
Word problems typically have details about the problem and extra information in them just like reading a passage for a purpose.
So for example, look at the following question:
6. You can win $10 if you can successfully do one of the following given one shot:
I Roll a 6 on a single number cube
II Roll a sum of seven on two number cubes
III Roll a number greater than 4 on a single number cube
Which of these three choices should you have the best chance of getting the $10?
(note, I am not making this offer)
F. I only
G. II and III
H. III only
J. I, II, and III
There's a lot of information here. Let's split up these things into Solve It, Use It, Junk It.
Solve It Use It Junk It
P(6) best $10
P(sum 7) number cube win
P(5 & 6) one shot
sum
greater than
Remember that P(6) is shorthand for the probability of getting a 6. As you can see 3 things are in the solve it category.
The $10 is extra information and doesn't help you solve the problem, so is junked.
Then in Use It, we see that we want to compare the probabilities from the word "best", that they all involve number cubes because no other probability device was used, and that they are not multiple events (one shot). We also see the word sum (which means add) and greater than. These are details that modify the probability needed.
After that we solve it by creating ratios. P(6) = 1/6. P(sum 7) = 6/36 and P(5 & 6) = 1/3.
Might need to think about this some more.
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