Solving for the Unknown in Multiplication and Division

What is the unknown number in the equation 7 times n equals 21?

• 5

• 4

• 3

• 2

Which strategy can be used to solve 7 times n equals 21?

• Adding 21 to 7

• Subtracting 7 from 21 repeatedly

• Multiplying 21 by 7

• Dividing 21 into groups of 7

In the equation 12 divided by n equals 3, what is the value of n?

• 5

• 4

• 2

• 3

How can you rewrite the division problem 12 divided by n equals 3 as a multiplication problem?

• 3 times n equals 12

• n times 3 equals 12

• n divided by 3 equals 12

• 12 times n equals 3

What is a key takeaway from the strategies learned for solving unknowns in multiplication and division?

• Multiplication problems are easier than division problems

• Different strategies can be used flexibly to find unknowns

• There is only one correct strategy for each problem

• Always use division to solve multiplication problems