Download over Lesson 5–3

Five-Minute Check (over Lesson 5–3)
Main Idea
Example 1: Write and Evaluate Algebraic
Expressions
Example 2: Write and Evaluate Algebraic
Expressions
• I will evaluate algebraic expressions.
Write and Evaluate
Algebraic Expressions
Meera’s age is y years less than 5. Write an
expression.
In this case, the words less than mean subtraction.
Words
y years less than 5
Variable
Let y represent how many years less.
Expression
5–y
The amount of money Shira has is d dollars less
than 10. Write an expression.
A. d – 10
B. 10 – d
C. 10d
D. 10 + d
0%
0%
A
B
1.
2.
3.
4.
0%
C
A
B
C
D
0%
D
Write and Evaluate
Algebraic Expressions
Amarella used half as many colors as Omar on
her poster. If Omar used 8 colors, how many did
Amarella use?
In this case, half as many means to divide by 2.
Words
half as many colors as Omar
Variable
Let c represent the number of colors
Omar used.
Expression
c÷2
Write and Evaluate
Algebraic Expressions
c ÷ 2
Write the expression.
8 ÷ 2
Replace c with 8.
4
Divide 8 by 2.
Answer: So, Amarella used 4 colors on her poster.
Wilma ate half as many grapes as Lucy. If Lucy
ate 14 grapes, how many did Wilma eat?
A. 5 grapes
B. 7 grapes
C. 11 grapes
D. 14 grapes
0%
0%
A
B
1.
2.
3.
4.
0%
C
A
B
C
D
0%
D
End of the Lesson
Five-Minute Check (over Lesson 5–3)
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Multiplication Expressions
(over Lesson 5–3)
Evaluate 3x if x = 5.
A. 14
B. 15
C. 16
D. 17
0%
0%
A
B
1.
2.
3.
4.
0%
C
A
B
C
D
0%
D
(over Lesson 5–3)
Evaluate 2y if y = 9.
A. 18
B. 19
C. 20
D. 21
0%
0%
A
B
1.
2.
3.
4.
0%
C
A
B
C
D
0%
D
(over Lesson 5–3)
Evaluate 7y if y = 9.
A. 60
B. 61
C. 62
D. 63
0%
0%
A
B
1.
2.
3.
4.
0%
C
A
B
C
D
0%
D
(over Lesson 5–3)
Write an expression. Then evaluate it.
Bill made n omelets. Each omelet requires
3 eggs. If n = 5, how many eggs did Bill use?
A. 5 + n; 10 eggs
B. 3 + n; 8 eggs
C. 5n; 15 eggs
D. 3n; 15 eggs
0%
0%
A
B
1.
2.
3.
4.
0%
C
A
B
C
D
0%
D