Sol 5.19 Expressions

Which situation could be represented by 12 - n = 6

• Mark had 12 baseball cards. He gave some to a friend. He now has 6 baseball cards.

• Mark had 6 baseball cards. He was given some more for his birthday. He now has twice as many.

• Mark had 6 baseball cards. He was given some more for his birthday. He now has 12 baseball

  cards.

• Mark had 12 baseball cards. He gave an equal amount to his friends. Each friend now has 6

  cards.

If "p" represents a number, which means the same as the expression P - 8?

• A number divided by eight

• A number multiplied by eight

• Eight more than a number

• Eight less than a number

If "w" represents a number, which means the same as the expression

w + 3?

• A number multiplied by three

• Three less than a number

• Three more than a number

• A number divided by three

If R represents a number, which means the same as the expression R-10?

• A number less than 10

• Ten less than a number

• A number divided by 10

• Ten more than a number

Which sentence matches the expression 3x = 33?

• Children had a box of doughnuts and ate three, they have thirty-three doughnuts.

• A box of doughnuts plus three more equals thirty-three doughnuts

• Three boxes with the same number of doughnuts equals thirty-three doughnuts.

• Three children ate thirty-three doughnuts each.

Which equation represents "a number, z, increased by 60 is 350"?

• z + 60 = 350

• z - 60 = 350

• z ÷ 60 = 350

• z × 60 = 350

Answer explanation

Choose y + 45 = 312 because the question states 'a number, y, increased by 45 is 312', indicating addition.

Alice filled f folders with 8 documents each. If there were a total of 64 documents, which equation would you use to determine the number of folders Alice used?

• f + 8 = 64

• 8 x f = 64

• 64 x 8 = f

• f - 8 = 64

If "b" represents a number, which of the following expressions represents 5 more than that number?

• b + 5

• b - 5

• 5 - b

Which equation represents, “a box of crayons plus three more is eleven crayons”?

• b ÷ 3 = 11

• 3b = 11

• b + 3 = 11

• 3 + 11 = b

Which mathematical sentence represents the following word problem? “How many cards are in a set of football cards if the set plus five more equals 62 cards, where f stands for the number of football cards in the set?”

• f – 5 = 23

• f x 5 = 62

• f + 5 = 62

• f ÷ 5 = 23