Vocabulary
Property that allows you to change grouping.
10+Y=20+4
y=14
The property which allows you to decompose a factor into smaller numbers.
Distributive Property
Morgan has 12 toy horses. 3 are bays, the rest are "Morgans". How many of each kind does she have?
Write an equation to solve.
3+M=12
M=9
3 bays and 9 morgan horses.
Mrs. Judge has 10 chickens. 8 are hens, how many are roosters?
8+R=10
2 roosters
Define "expression"
a number or combination of numbers and operations (with NO answer written).
45-W=21
w=24
Associative Property
Katelyn has 18 LOL dolls. 9 have brown hair, some have blond hair, and 5 have red hair. How many of each type does she have? (Use "B" for blond)
Write an equation to solve.
9+B+5=18
14+B=18
B=4
9 brunettes, 4 blonds, 5 red-heads.
Miss M had $15 to buy pencils and rulers for her class. The pencils cost $1 each and the rulers cost $2 each. If she buys 4 rulers, how many pencils can she buy? (Show your work).
(2x4) + P = 15
8 + P = 15
p= 7
She can buy 7 pencils
Operations. Name all 4.
add
subtract
mult.
div.
(13+7)-(23-13) + B = 18
B=18
DAILY DOUBLE!
This property allows you to change the order of 2 factors, and it does not effect the product.
Commutative Property .
I have 25 markers, some are sharpies, some are white board markers. If I have 4 times as many white board markers as sharpies, how many of each do I have? Hint, use "s" for sharpie. S=5. Write an equation to solve.
(4xS) + S = 25
5xS = 25
S= 25 / S
S= 5, so W=20
Ellsworth Fire Station has twice as many fire trucks as the Cherryfield Fire Station. There is a total of 18 fire trucks. How many does Cherryfield have? Ellsworth?
(Tx2) + T = 18
Tx3=18
18 divided by 3 = 6
T=6
Cherryfield has 6 trucks, Ellsworth has 12.
Variable, what does it mean?
a symbol or letter that stands for an unknown.
(20-10) -5 = Z
z=5
Write an example of Distributive Property.
See Work
Eliza planted 30 sunflower seeds, 3 out of every 5 seeds grew into flowering plants. How many plants does Eliza have?
18 plants.
Niomi and 3 friends are going to see a movie. Each ticket costs $6. Each person also bought a small bag of popcorn. If the friends spend a total of $32, how much does each bag of popcorn cost? (Show your work)
P stands for popcorn total
(6x4)+P=32
24+P=32
P=8, then divide by 4 for the 4 friends,
each bag of popcorn costs $2
Define: evaluate
to find the value of an expression
(to solve an equation/expression.)
(24-12)+(30-X)=22
30-X=10
x=20
Write an example of associative property.
see work
There are 11 kids in the class. The West bus has 4 rows of seats, and teach row holds 3 kids. How many children can the bus hold?
12 kids
Miss Brown has a dozen bottles of glitter. 3 are blue, green is 2 more than blue. Yellow is 3 less than green. The rest are gold. How many of each color does she have?
3+2=5green
5-3=2yellow
5+2=7
7+3=10
12-10=2 gold
3 blue, 2 yellow, 2 gold, 5 green.