Sol 5.19 Expressions

Which equation represents “a number, decreased by 36 is 248”?

• z + 36 = 248

• z – 36 = 248

• z x 36 = 248

• z ÷ 36 = 248

• 36 – z = 248

Tom had 45 stamps in his collection. After giving away x stamps to his friend, he has 30 stamps left. Which equation represents how many stamps he gave away?

• 45 + x = 30

• 45 - x = 30

• x + 30 = 45

• 45 / x = 30

Three years ago, Maya's family had 4

members including her two siblings.

Her family now has 7 members. Which

equation could be used to determine

how many new family members have

joined her family?

• 4 + f = 7

• 4 - f = 7

• 4 x f = 7

• 7 ÷ f = 4

Michael has 12 books in his collection. After visiting the bookstore, he now has a total of 20 books. Which equation would best be used to determine how many books were added to his collection?

• 12 + 8 = b

• 12 - b = 20

• 20 + b = 12

• 12 + b = 20

William’s age is 9 times Susan’s age. If Susan’s age is S, which expression best represents William’s age?

• 9 x S

• 9 + S

• S – 9

• S ÷ 9

In the expression m- 5, the letter m represents

• an unknown number

• a number sentence

• a subtraction symbol

• an addition symbol

Nancy has 7 times more vacation days 
than Laura. If v represents the number 
of vacation days Laura has, what expression represents the number of vacation days  Nancy has? 

• 7-v

• v-7

• v + 7

• 7v

Joey packed b boxes with 4 ornaments in each box. If there were 36 ornaments, what number sentence would be used to find out how many boxes Joey packed?

• 4 × b = 36

• b - 4 = 36

• b + 36 = 4

• 36 × 4 = b

If "a" represents a number, which of the following means 7 less than a number?

• a - 7

• a + 7

• 7 - a

Which expression represents the phrase "the quotient of a number and 9"?

• x - 9

• 9x