Relationship between Multiplication and Division

Jenny has 24 stamps in 4 equal packs. She wants to find out the number of stamps that come in each pack. She wrote the following two equations:

24 ÷ ? = 4 and ? × 4 = 24.

What number makes both equations true?

• 6

• 7

• 20

• 28

Which problem can be used to check the results of the problem

8 × 9 = 72?

• 8 + 9 =

• 8 × 72 =

• 9 × 72 =

• 72 ÷ 9 =

Jessica wants to put 60 books evenly on 5 bookshelves. Which equation could she use to help her find the number of books that should be placed on each shelf?

• 5 x n = 60

• 5 ÷ 60 = n

• n ÷ 60 = 5

• 60 x 5 = n

There are 36 students and 4 adults going on the field trip. Mr. Holland wrote the division sentence below to show how many students would be assigned to each adult.

36 ÷ ??? = 4

Which number sentence can be used to find the number of students assigned to each adult?

• ??? ÷ 4 = 36

• 4 x ??? = 36

• 36 x 4 = ???

• 4 ÷ ??? = 36

Which option is equal to the equation

(3 × 8) + (2 × 8) = __?

• (3 × 2 × 8)

• (3 × 8 × 2)

• (5 × 8)

• (6 × 8)

Evaluate each expression below. Select THREE expressions that is equivalent to the product of

4 and 9.

• 4 × (5 + 4)

• (4 × 1) × (9 × 1)

• (2 × 2) × (5 × 4)

• 9 × (4 + 1)

• (3 + 1) × (3 + 6)

Dexter had 4 packs of pencils. Each pack had 9 pencils in it. He writes a number sentence to find how many pencils he has in all.

__ ÷ 4 = 9

What is another number sentence that gives the same answer for __?

• 7 x 6 = __

• 4 x 8 = __

• 10 x 4 = __

• 6 x 6 = __

Sharine works at a pet store and needs to put 81 goldfish into 9 tanks. She needs to put the same number of goldfish in each tank. She uses the number problem below to help her find out how many goldfish she should put into each tank.

81 ÷ 9 = ?

Which sentence could help Sharine solve the problem?

• Sharine should put 7 goldfish into each tank because 81 ÷ 9 = 7

• Sharine should put 9 goldfish into each tank because 9 x 9 = 81

• Sharine should put 9 goldfish into each tank because 9 ÷ 1 = 9

• Sharine should put 8 goldfish into each tank because 9 x 8 = 81