1. COLEGIO SAN PATRICIO
Math Practice for 3rd Period Exam
School Year 2009 – 2010
Name: ___________________________________________________ 7th: _____
Date: ____________________________________________________ L.N.: ____
Binary System
48 = 104 =
58 = 202 =
The Number Line
Write the missing numbers.
Order the next numbers in the number line.
0, , 0.50 , , 1 , 1.25 , 2
Answer the next problems.

2. Is it correct?
1. 2x + 6 = 12 ______________ Two times a number, plus six is
twelve.
2. (5) (6) − x = 25 ______________ Five times the difference of six
and a number is twenty five.
3. 8(4 + 9) = 104 ______________ Eight times the sum of four and
nine is one hundred four.
Solve.
1. If 2/3 of the pizza are left, what part will you and your two friends get?
2. There are 36 donuts in a box. Each donut is either chocolate or
cinnamon. There are 6 fewer chocolate donuts than cinnamon. Let x
be the number of cinnamon. Underline the correct expression.
a) x+x −6 =36 b) x+x(x−6)=36 c) x−6=36
3. My brother will be forty years old in forty years. Let b be the age of my
brother now:
a) 40 −b =4 b) b+4 = 40 c) b−4 = 40
4. Donna got 84 in a quiz, which includes 5-point bonus. Let x be the
grade she would have had without the bonus.
a) x −84 = 100 b) x − 5 = 100 c) x + 5 = 84
Write an equation.
1. I have to check 90 exams. I have checked 35. How many exams am I
missing?
2. One trip is ¾ kms. If we decide to take 6 trips, how many kilometers
are we going to travel?
3. You are shopping for earrings. The sales tax is 5%. You have a total of
$18.37. What is your price limit for the earrings?
Simplify the expressions.

3. 1. −6(a+8) 3. 4(1+9x)
2. 6(−5n+7)
Write each as an algebraic expression.
1. The difference of 10 and 5
2. The quotient of 14 and 7
3. u decreased by 17
4. The product of x and 7
5. Twice q