Writing & Describing

Algebraic Expressions

5 + x

MORE THAN

Less Than

Chapter 2 Lesson 2Variable: a symbol that stands for a number.

Examples: a, b, x, y, …...

Algebraic Expressions: a group of numbers, variables, and operations.

Examples: 13 - g z + 2 3x + 8

Add Subtract Multiple Divideplus minus the product the quotient

Combined, together

the difference

multiply, times

divide

the sum subtract groups of into

total of *less than times each, for every

increased by

decreased by

double, triple

per

*more than fewer than Twice out of

additional how much more than..

of shared equally

Examples: 3 less than a number

n - 3

The sum of 5 and a number

5 + b

The product of 7 and y

7y

Rules:

• Write each problem the way you read the words from left to right.

• “more than” OR “less than” means flip the problem parts.

Write an algebraic expression for each word phrase.

1. The sum of eighty-nine and a number.2. The difference between forty-six

and h.3. The quotient of twenty and a number.4. Fifty-five times f.

Write an algebraic expression for each word phrase.

1. one more than the product of twelve and a number Answer: 12p + 1

2. four less than a number n divided by two Answer: n ÷ 2 - 4

3. Six minus the quotient of u and two

Answer: 6 – u ÷ 2

Translate each algebraic expression into words.

1. 3 + n Answer: 3 more than a number

2. 7h Answer: the product of 7 and h

3. a – 5 **use the word “less than” Answer: 5 is less than a

Translate each algebraic expression into words.

4. 4b – 3Answer: 4 multiplied by b minus 3 OR three less than the product of four and b

5. 16g + 12Answer: The product of 16 and g plus 12 OR Sixteen times g plus 12

Chapter 2 Lesson 3Function Tables

w w ÷ 4 n 4 x n + 6

88 1  

60 2  

100 3  

Evaluate each expression to find the missing value in each table.

Evaluate each expression to find the missing value in each table.

n 2n - 2

1  

6  

7  

n 25 - n20 55  18  9  

Find an expression for each table.

x  0 072 988 11

n  15 4025 5035 60

x ÷ 8 n + 25

Find an expression for each table.

n  

13 26

9 18

30 60

25 50

x  

8 6

4 2

2 0

2n x - 2

Combining Like Terms

• 3s + 7 – 4 + 4s – 5s + 8p• Let’s put together things that are alike:• 3s + 4s – 5s= 2s• 7 – 4 = 3• 8p• Altogether: 2s + 3 + 8p• Let’s do more

Combining Like Terms

Rules:

• Write each problem the way you read the words from left to right.

• “more than” OR “less than” means flip the problem parts.

Translate each algebraic expression into words.

1. 3 + n Answer: 3 more than a number

2. 7h Answer: the product of 7 and h

3. a – 5 **use the word “less than” Answer: 5 is less than a

Evaluate each expression to find the missing value in each table.

n 2n - 2

1  

6  

7  

n 25 - n20 55  18  9  

Combining Like Terms

• 3s + 7 – 4 + 4s – 5s + 8p• Let’s put together things that are alike:• 3s + 4s – 5s= 2s• 7 – 4 = 3• 8p• Altogether: 2s + 3 + 8p• Let’s do more