variables and expressions
grade 5 pre - algebra worksheet
write an expression to answer each question. state what the variable is. the first one is done for you as an example.
john scored 3 more points than james. how many points did john score? expression: p + 3 variable: p = number of points james scored
1. jasmine is three times as old as her brother michael. how old is jasmine?
2. carl has n colored - pens for his artwork. if his mother gives him 11 more colored pens, how many colored - pens does he have in all?
3. jimmy works 20 days in a month. if he was absent for d days last month, how many days did he work?
4. sarah has m baskets of mangoes. if she will be able to sell 8 baskets of mangoes, how many baskets of mangoes will be left?
5. dennis shared his p marbles among his 5 friends. how many marbles did each friend receive?
6. jenny earns $2 for every dress she manages to sell. how much will she earn for b dresses?
7. sonny has 12 more playing cards than jamie. how may playing cards does sonny have?
8. the width of the rectangle is 12 cm shorter than its length. what is the measurement of the width?
9. anne bought a laptop for $w after receiving a discount of $15. what is the original price of the laptop?
10. flynn bought n pairs of socks for a total of $8. how much is each pair of socks?

Question

Accepted Answer

# Explanation:
## Step1: Define variable for Michael's age
Let $a$ be Michael's age.
## Step2: Find Jasmine's age expression
Since Jasmine is three - times as old as Michael, the expression is $3a$.
# Answer:
Expression: $3a$; Variable: $a$ = number of years of Michael's age

# Explanation:
## Step1: Start with initial number of pens
Carl has $n$ colored - pens.
## Step2: Add the new pens
His mother gives him 11 more, so the total is $n + 11$.
# Answer:
Expression: $n+11$; Variable: $n$ = number of colored - pens Carl had initially

# Explanation:
## Step1: Know the total working days
Jimmy is supposed to work 20 days.
## Step2: Subtract absent days
He was absent $d$ days, so the number of days he worked is $20 - d$.
# Answer:
Expression: $20 - d$; Variable: $d$ = number of days Jimmy was absent

# Explanation:
## Step1: Start with initial number of baskets
Sarah has $m$ baskets of mangoes.
## Step2: Subtract the sold baskets
She sells 8 baskets, so the number left is $m - 8$.
# Answer:
Expression: $m - 8$; Variable: $m$ = number of baskets of mangoes Sarah had initially

# Explanation:
## Step1: Have total number of marbles
Dennis has $p$ marbles.
## Step2: Divide among friends
He shares among 5 friends, so each friend gets $\frac{p}{5}$.
# Answer:
Expression: $\frac{p}{5}$; Variable: $p$ = number of marbles Dennis had initially

# Explanation:
## Step1: Know earnings per dress
Jenny earns $2$ dollars per dress.
## Step2: Multiply by number of dresses
For $b$ dresses, she earns $2b$.
# Answer:
Expression: $2b$; Variable: $b$ = number of dresses Jenny sells

# Explanation:
## Step1: Define variable for Jamie's cards
Let $c$ be the number of Jamie's playing cards.
## Step2: Find Sonny's cards
Sonny has 12 more than Jamie, so Sonny has $c + 12$.
# Answer:
Expression: $c + 12$; Variable: $c$ = number of playing cards Jamie has

# Explanation:
## Step1: Define variable for length
Let $l$ be the length of the rectangle.
## Step2: Find width
The width is 12 cm shorter than the length, so the width is $l-12$.
# Answer:
Expression: $l - 12$; Variable: $l$ = length of the rectangle in cm

# Explanation:
## Step1: Let original price be $x$
Let the original price of the laptop be $x$.
## Step2: Consider discount
After a $15$ - dollar discount, the price is $w$, so $x-15 = w$, and $x=w + 15$.
# Answer:
Expression: $w + 15$; Variable: $w$ = price of the laptop after discount

# Explanation:
## Step1: Have total cost and number of pairs
Flynn bought $n$ pairs of socks for 8 dollars.
## Step2: Find cost per pair
The cost per pair is $\frac{8}{n}$.
# Answer:
Expression: $\frac{8}{n}$; Variable: $n$ = number of pairs of socks Flynn bought

Sovi.AI - AI Math Tutor

QUESTION IMAGE

Question

Explanation:

Step1: Define variable for Michael's age

Step2: Find Jasmine's age expression

Step1: Start with initial number of pens

Step2: Add the new pens

Step1: Know the total working days

Step2: Subtract absent days

Step1: Start with initial number of baskets

Step2: Subtract the sold baskets

Answer: