Download Writing expressions notes Aug 29

1.
How long does a car traveling at 70 mph
take to travel 88 miles, in hours?
2.
If you are buying kiwis for $1.89 per
pound, how much will you pay for 20
ounces of kiwis?
CCCA Unit 1
Why
is it important to understand
the “language” of mathematics?


Identifying Parts
 Can
have variables, numbers, addition,
subtraction, multiplication, division, parenthesis,
square roots, exponents…
 Examples:
x2
3  x  2
5b  7c  d
5 xy
 Symbols
or letters used to represent an
unknown
 Examples:
x



 How
many items are being added, subtracted,
divided
 Examples:
2
5a  2 xy  3
3
P  2x
2
a b
4
 Same
variable raised to the same power
 Examples:
2
2
5 x y and 8 x y
2
7y and 22y
2
 The
number in front of a variable
 Examples:
123 xy
3 2
123
9xy z
9
x
1
 The
number up in the air next to a base
 The number of times you multiply something
times itself
 Examples:
3
3
12
12
2
x
4
3 y  7
4
 What
the exponent sits on
 The part that has been raised to a power
 Examples:
3
2
12
x
2
x
4
3 y  7
y
A
number that has no variable
 It can be positive or negative
 Examples:
42
-42
3x  5
5
2
4
5 x  3y  8
-8
 Items
that are being multiplied together
 Can be numbers, variables, parenthesis
 Examples:
6
1 and 6…. Or 2 and 3
9xy 9 and x and y
 x  2  y  3  (x + 2) and (y – 3)
3  z  9  3 and (z – 9)
Sum
Plus
Add
More
Than
Increased
Difference
Minus
Decreased
Less
Than (swaps the order)
Quotient
Half
Divide
by
Product
Twice
Double
Triple
Square
Cubed
To
the power of
Raised to a power
The sum of a number and 10
x + 10
The product of 9 and x squared
2
9x
9 less than g to the fourth power
4
g –
9
8 + 3x
Eight increased by three times x


Tapas and Tennis
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