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Lesson Plan and Materials Below:
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Watch as Farmer Maslow takes us on a tour of his farm by the sea as he plants his new crops. As he plants a field of green beans, he'll be showing us how to multiply two-digits by two-digits using the area model. Also known as the Singapore Method, using geometric models to show a deeper understanding of the mechanics of multiplication is something that is a regular part of Farmer Maslow's everyday life.
Numberock Songs for:
US Age Range
3rd Grade - 5th Grade Elementary School Math
UK Age Range
Year 4 Year 5 KS2 Maths
A farmer was planting green beans
in fourteen rows of fifteen.
The area model is how he thought
about the number of plants he got.
First, he multiplied ten by ten
and wrote one hundred with his pad and pen.
Then he multiplied ten by five;
there were fifty more plants coming alive.
Then ten times four equals forty,
and just the bottom corner was empty.
So, he multiplied five by four
and ended up with twenty more.
Split up the place values in multiplication.
Multiply the tens to get the foundation.
Then the other place values get multiplied.
Add the partial products up, and check your work twice.
Then the farmer planted black beans
in twenty-two rows of fifteen.
To find out how many plants he had,
he drew the area model on his sketch pad.
He did twenty times ten and wrote two hundred down;
then ten times two, and twenty’s what he found.
Twenty times five was one hundred, and then,
five times two equaled ten.
He added two hundred, one hundred, twenty, and ten;
the sum was three [hundred] thirty; he checked it again.
So, there were three hundred thirty black beans
in twenty-two rows of fifteen.
http://www.NUMBEROCK.com is a provider of educational videos for kids which was founded by an innovative 5th Grade teacher who envisioned a new kind of classroom where students got energized for math class. Parents of his students even noticed their children singing mathematics songs around the dinner table well beyond school hours.
Seeing his students so enthusiastic when it was time for math was welcome, to say the least! But the epiphanous moment was when students were singing math songs all-day long like they were in the American Top 40!
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This video addresses the following Common Core Standards:
Multiply a whole number of up to four digits by a one-digit whole number, and multiply two two-digit numbers, using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.
Find whole-number quotients of whole numbers with up to four-digit dividends and two-digit divisors, using strategies based on place value, the properties of operations, and/or the relationship between multiplication and division. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models.
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Yes, it does. What we usually call multiplication is actually the Distributive Property. The reason teachers teach the Area Model is to make sure that kids don't forget to distributive (or multiply) any parts. The Distributive Property comes up A LOT in math. As you continue to study it, you will usually see the Distributive Property represented like this: 14 X 15 = (10 + 4)(10 + 5)..or something similar to this. There are actually a lot of ways you could break down this problem, using the Distributive Property.
Make some more v8dios for 5th grade area model you know i read all the comments and all of tham where praty good tjanks for writhing tham and wachaning our videos a very nice of u guys see you at my next videos byy
Hey Josh, thanks for the comment! I think that it would be useful for a lot of teachers to have a version of this song with two digit x one digit problems. Since I made this song for my lesson, it ended up being two digit x two digit to fit into my objective. Someday I hope to get around to covering every math topic from K-6.
I love this so much! It is going to be so helpful in teaching my 4th graders about the area model in the coming weeks. Thank you so much for making a groovy song to explain this multiplication strategy! :-)
The Area Model is just used to show the concept of what is going on with the numbers, but it's not the only way to multiply. There is also the standard algorithm and the Lattice Method of multiplication. There are more, but these are the most common ones.
For towns, each building is described, along with what and who can you can talk to, who to buy skills from, and what quests are available. For the outlying areas, the dungeons are listed.
Dungeon maps are not given -- they would be too extensive to fit easily into a web page and the automapping in the game is excellent. Also, every dungeon should be explored completely to get all of the loot, but only puzzles and hidden locations are described. I also skip most of the fighting because it isnt something that you can easily describe, nor does it matter in most places, except that you have to survive it. I do list the creatures that you will encounter in a dungeon or grid location to give you an idea of how difficult the location is.
Stores are listed with a "buy" and "sell". The "buy" value is multiplied by the items value to determine the price you have to pay for it. The "sell" value is divided by the items value to determine the price you can sell it to the store for. Higher is always worse, and a "buy" or "sell" of 1 means that you are buying/selling an item at cost.
Every location has a "reset" timer. This starts when you first enter the area, and after it "goes off", the entire grid square resets: monsters reappear and random treasure is replaced. Nonrandom treasure (including most stat-gaining liquids) is not replaced. All dungeons have a reset of 2 years (24 months), unless otherwise noted. Overland areas have reset times listed with their descriptions.
Artifacts are unique items that can be found. They come in two flavors: Minor artifacts are always benificial and have a value of 20000gp. Major artifacts always have a drawback, but their benificial powers are much stronger. They have a value of 30000gp. There are 15 minor and 15 major artifacts -- some of these artifacts are placed at specific locations; others are randomly generated.
Table of Contents.