Writing Expressions
Write the following word phrase as a variable expression:
The sum of a number and 8
x+8
Evaluate the following when x=4 ...
x/2+1
3
Add:
18+(-7)
11
Subtract:
9-14
-5
Evaluate:
|249|
249
*absolute value is ALWAYS positive*
Write the following word phrase as a variable expression:
The quotient of a number and 4
x/4 or x divide 4
Evaluate the following when x=3 ...
7x-9
Add:
-14+(-13)
-27
Subtract:
9-(-8)
17
Evaluate:
-10+6-12
-16
Write the following word phrase as a variable expression:
The product of a number and 11, minus 2
11x-2
Evaluate the following when x=5 ...
3^2times(x+1)
54
Add:
-22+9
-13
Subtract:
-7-22
-29
What is the definition of an integer?
Positive or negative whole numbers, and zero.
Write the following word phrase as a variable expression:
10 less than the quotient of 7 and a number
7/x-10 or 7dividex-10
Evaluate the following when x=6 and y=13...
x^2-2y
10
Add:
-82+25
-57
Subtract:
-51-(-15)
-36
Rewrite using an exponent, and evaluate:
7 times 7 times 7 times 7
74 = 2,401
Write the following word phrase as a variable expression:
9 more than 3 times the difference of a number and 6
3(x-6)+9 or 9+3(x-6)
Evaluate the following when x= -3 and y=12...
y^2-x
147
Add:
-40+13+(-2)
-29
Subtract:
10-15-(-23)
18
What do we call two numbers that are opposites of each other (for example, 4 and -4)?
additive inverses