Divide and Conquer

Division Equation Vocabulary



Division Strategies

 Division as Repeated Subtraction

42 divided by 7     Repeatedly subtract 7 from 42 until you reach a difference of 0 

42-7= 35
35-7=28
28-7=21
21-7=14
14-7=7
7-7=0

Now count how many times you subtracted 7

You subtracted 6 times, so the quotient (answer to a division equation) is 6.




More Repeated Subtraction, using powerful facts

36 divided by 2

Think powerful! If I know 2 x 1 then I know 2 x 10

So instead of subtracting 2 repeatedly, I can start by subtracting 20

36-20 = 16 (since I subtracted 20, that's the same as 10 two's)

Now think 2 x ?? = 16........ 8!

Subtract 16
16-16 = 0 (Since I subtracted 16, that's the same as 8 two's)

So how many times did I subtract 2? Well, 10 + 8 = 18

So, 36 divided by 2 = 18



Standard Algorithm





Area Model





Due to the Area Model being difficult to draw onto the blog, please read and follow the step by step guide sent home on Wednesday.


Click the link below to take you to an awesome Blendspace that shows multiple strategies for division.


Division Strategies


You can also visit http://www.cfgmath.weebly.com for lots of resources, guides, and games to help your child at home.

Lights On!

Open Circuits do not allow electricity to flow.
 
Closed Circuits allow electricity to flow.



Parallel Circuits have 2 or more pathways for electricity to flow through. If one part of the circuit broken or misplaced, one of the bulbs in the circuit will still light up.


 
Series Circuits have only 1 pathway for electricity to flow through. If one part of the circuit is broken or misplaced, the bulbs in the circuit will not light.



Conductors are items that conduct electricity or could complete a circuit by allowing electricity to flow.




Insulators are items that stop the flow of electricity.

Shocking News!

Our unit on Electricity was started this week and we are off to a great start! The students know a lot already about electricity and objects that use it.


First we watched a Bill Nye the Science Guy video (link below) and took notes of new and interesting facts about electricity. Here are some of the things students posted:


video link: https://www.youtube.com/watch?v=BhYbmcbYJn8

Then we brainstormed some objects at home or maybe that we got for Christmas that use electricity. Here are some things we came up with:

Then we used our list to decide what kind of energy those objects actually produce.

 

Light Energy 



We quickly noticed that a lot of things produce more than one form of energy!

Math @ Christmas??

I hope everyone had a great winter break!! It was wonderful to see everyone on back to school on Monday.

 

I know no one likes to think about school while they are on vacation.....BUT.....did anyone use Math over the break?

 

If you can post 1 or 2 ways that you used math over the break, you can earn 5 extra points on the Multiplication test this Friday!
You need to tell me what you did and what math concept is used.

 

Some examples may be:

• Counting $$ you got from family practices addition and decimals.
• Baking & using a recipe uses measurement.
• Going shopping with money or gift cards uses addition and estimation to make sure you have enough money to buy what you want.
• Sharing candy with friends or siblings uses division.

So how did YOU use math this Christmas?