3rd Grade Math Study Guide

3^rd Grade 2^nd 9 Weeks Math Study Guide:

Unknown Numbers:   7 x ? = 35          36 divided ? = 6

Properties of Operation:

Commutative Property      7 x 2=    2x7=                     order does not matter

Associative Property          (3 x 5) x 2 =      5 x (3 x 2)=        order does not matter

Distributive Property        8 x 9 =

Multiplication/Division:           7 x 7=     8 x 6 =        18 divided 2 =           48 divided 8 =

Two-Step Word Problems:    Tom went to the store and bought a box of cookies that cost $5.  He also picked up a bag of apples for $6 and a pack of meat for $9.  How much change did she get back if she paid with $40?

Patterns:  Find the rule and finish the pattern.

5, 10, 15,__,___,___                                     2, 4, 8, 16,___                        3, 8, 13,__,__

Multiply by Multiples of 10:          40 x 8=                      90 x 3=            60 x 7=

Area:    Find the area of each shape.    

         

Solar System

THE SOLAR SYSTEM IS THE SUN AND THE OBJECTS THAT ORBIT AROUND IT.
THE SOLAR SYSTEM IS THE SUN AND THE OBJECTS THAT ORBIT AROUND IT.


THE SUN IS THE CENTER OF THE SOLAR SYSTEM.

The Sun is important because it provides the Earth heat.

It is one of the prime ingredients for most Earth life-forms.

PLANETS


A planet is a large body of rock or gas that orbits the sun.

The solar system has nine planets. (Pluto is a dwarf)

INNER PLANETS


Mercury

Venus

Earth

Mars

They are the four planets closest to the sun.

Inner Planets have rocky surfaces, and they are warmer than the outer planets.

EARTH IS DIFFERENT FROM THE OTHER INNER PLANETS.  IT  HAS A WATERY SURFACE.  IT IS THE ONLY PLANET WITH A LOT OF OXYGEN IN ITS ATMOSPHERE.  EARTH HAS PLANT LIFE AND ANIMAL LIFE.

OUTER PLANETS


1.  Jupiter

2.  Saturn

3.  Uranus

4.  Neptune

5.  Pluto

OUTER PLANETS ARE MADE MOSTLY OF FROZEN GASES.  THEIR SURFACES ARE COLDER THAN THE INNER PLANETS BECAUSE THEY ARE FARTHER AWAY FROM THE SUN.  MOST OUTER PLANETS HAVE MANY MOONS.

OUTER PLANETS ARE MADE MOSTLY OF FROZEN GASES.  THEIR SURFACES ARE COLDER THAN THE INNER PLANETS BECAUSE THEY ARE FARTHER AWAY FROM THE SUN.  MOST OUTER PLANETS HAVE MANY MOONS.

--------------------------------------------------------------------

The students will be working together to complete an in class project this week for their grade. They will be working in groups to research various facts about the planet they are assigned. All of these facts will be put onto a class chart in the hallway for everyone to see and learn from. Then on Friday we will create a Solar System diagram, with each group illustrating their own planet, and display this down the hallway as well!

If you have any questions please feel free to leave a friendly comment or send me an email! Thanks for visiting!

Arithmetic Patterns

Pattern:
Things that are arranged following a rule or rules.

Example: there is a pattern in these numbers: 2, 7, 12, 17, 22, ... they follow a rule "start at 2 and add 5 each time"

What is a RULE?

A RULE is a set of directions on how to create a
pattern.

In other words: it tells you what to do with the
pattern.

EX: Rule--Start at 0 and add 2

Pattern: 0, 2, 4, 6, 8, 10, ___, ___, ____

Patterns can be found in addition, subtraction,
multiplication, and division.

• Addition-- start at 0 and add 3
• Pattern-- 0, 3, __, ___, ___

• Subtraction--take 5 away
• Pattern--- 25, 20, ___, ____, ____

• Multiplication--- count by 4

• Pattern--4, 8, ___, ___,____

• Division--Divide by 2
• Pattern-- 40, 20, ___,____

Classroom Donations

Hello!

I wanted to let you know that Ms. Jefferson and I are accepting donations from the students in exchange for Rebel Rewards. The list is: 

• Copy Paper ---10 Rebel Rewards
• Glue/Glue Sticks --- 1 Rebel Reward per Stick
• Pencils --- pack of 12 (5 Rebel Rewards) pack of 24 (10 Rebel Rewards)
• Card Stock Paper --- 10 Rebel Rewards
• Candy for Behavior --- Small Bag (5 Rebel Rewards) Big Bag (10 Rebel Rewards)
• Notebooks --- 5 Rebel Rewards per notebook
• Writing Paper --- 5 Rebel Rewards per pack
• Expo Markers --- 5 Rebel Rewards
• Folders with Prongs --- 3 Rebel Rewards
• Tissues --- 10 Rebel Rewards
• Clorox Wipes --- 10 Rebel Rewards
• Germ-X --- 5 Rebel Rewards
• Coloring Things (crayons, markers, colored pencils) --- 3 Rebel Rewards (Ms. Mason only)

Ms. Mason is currently low on: Clorox Wipes, Paper Towels, Coloring Things, Germ-X, and Copy Paper

Ms. Jefferson is currently low on: Germ-X, Writing Paper, and Pencils.

Thank you and have a wonderful day!

-Ms. Mason

Genetics

Today, we began discussing genetics and traits. We will be continuing this discussion all week and focusing on figuring out what an animal will look like as an adult, or what an animal did look like as a baby. 

Talk with your child about their traits and where they came from (or where they might have come from), and talk with them about recessive and dominant traits that run through the family. I will post a link to a very good website about Genetics on the "Fun Videos and Websites!" page. 

The grades for this week will come from the students illustrating what animals will look like at a different age based on a picture they are provided. I.E. They are given a picture of a baby chimp and have to draw what the chimp will look like as an adult based on the traits they see in the photo. 

Microorganism

What is a microorganism?


Well...

“micro” means extremely small

“organism” means a living thing
So! This tells us that a microorganism is an “extremely small living thing.”


There are actually different kinds of germs.

Germs are bacteria, viruses, and other microorganisms that cause diseases

The two main types of germs are bacteria and viruses.

Bacteria are unicellular organisms that can live by themselves or as parasites

Viruses are the main component of most human diseases.

There is actually a big debate between scientists about whether viruses are “alive” or not.






This is a Tardigrade or Water Bear. It is a micro-animal that was discovered in 1773! This picture was made using an electron microscope! That is a very awesome microscope that basically shoots tiny electrons at the thing it is looking at and uses special lenses to help you see it!

They are considered the most resilient animal because they live in places that would instantly kill other animals, including OUTER SPACE! HOW CRAZY IS THAT?

There are actually microorganisms used to make a lot of foods!

A bacterium called Acetobacter tropicalis is found in chocolate.

A bacterium called Lactobacillus acidophilus is found in yogurt.



Those are just some examples. There are THOUSANDS more.

Area of a Shape

What is Area?

• The size of a surface.

• The amount of space inside the boundary of a flat (2-dimensional) object such as a square, rectangle, triangle or circle. 

Area by Counting Squares

• To find the area of a shape you can count the units/squares it takes to create the shape.

The rectangle has an area of 16

If each square was 1 cm on a side, then the area would be 16 cm2 (16 square cm).


Approximate Area by Counting Squares

• Sometimes the squares don't match the shape exactly, but we can get an "approximate" answer.

One way is:

more than half a square counts as 1
less than half a square counts as 0
if exactly half a square count as 1/2

The Area of a square/rectangle can also be found by
using a formula:

Base x Height = Area