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Name ________________________________________________Period ________
MATH 7 - 10.2 Divide and Multiply Before You Add and Subtract
Evaluate the numerical expressions
1) 3 + 6 × 7
Evaluate the variable expressions for x = 12
8) 5 + 3x
9) 11 −
2) 12 − 15 ÷ 5
x
4
10) 2x + 8 −
x
2
3) 14 + 8 × 2 + 3
11)
x
− 1 + 4x
3
4) 18 − 12 ÷ 2 + 7
12) 5x + 4 −
5) 5 × 9 − 24 ÷ 12
x
−5
6
Evaluate the expressions for x = -2 and y = 6
6) 21 ÷ 7 + 8 × 5
13) −5y + 12
7) 8 + 3 × 6 − 10 + 20 ÷ 4
14)
−12
+ 10 − 2y
x
Concept Check
Fill in the blank.
Test Preparation
Circle the one correct response.
How many terms are in the following variable
expression?
Which of the following statements is true?
a) Multiplication always comes before division.
x
1
+ 5x − 7 + x + 3
2
2
____________?
b) Addition always comes before subtraction.
c) Multiplication and division are both part of the same
step so to break the tie you do them left to right.
d) Subtraction always comes before multiplication.
More Challenging
If "g" and "h" are positive numbers, answer
sometimes, always, or never if each expression is
positive.
g × ( −h) __________________
Mathematical Reasoning
In your own words.
Peter evaluated the following expression.
4(3) + 20 ÷ 2
= 12 + 20 ÷ 2
= 32 ÷ 2
−g × (−h) __________________
= 16
Describe what Peter did wrong.
−g + h ____________________
___________________________________________
___________________________________________
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Review
What is the variable in the expression k + 5?
Review
Evaluate the variable expression k + 5 for k = - 2.