Determining Unknown Terms in Multiplication and Division

The video tutorial covers the third-grade math concept of determining an unknown term in a multiplication or division problem. It uses a problem from the 2018 released STAAR test to illustrate the concept. The tutorial explains the division equation, introduces math terms like dividend, divisor, and quotient, and demonstrates solving the problem using multiplication. It also analyzes incorrect answers and common mistakes students might make.

What grade level is the concept of finding an unknown term in multiplication or division aimed at?

• Second grade

• Third grade

• Fourth grade

• Fifth grade

Tags

CCSS.3.OA.A.4

What operation is used to find the unknown number in the given problem?

• Addition

• Subtraction

• Multiplication

• Division

Tags

CCSS.3.OA.A.3

What is the total number called in a division problem?

• Product

• Divisor

• Dividend

• Quotient

Tags

CCSS.3.OA.A.2

What term describes the number you divide by in a division problem?

• Subtrahend

• Multiplier

• Dividend

• Divisor

Tags

CCSS.3.OA.A.2

What is the result of a division called?

• Quotient

• Product

• Difference

• Sum

Tags

CCSS.3.OA.A.2

How can a division problem be represented?

• Either as a strip or a part-part-whole diagram

• Only as a part-part-whole diagram

• None of the above

• Only as a strip diagram

Tags

CCSS.4.NBT.B.6

CCSS.5.NBT.B.6

What mathematical operation can represent 11 groups of 9?

• Division

• Addition

• Multiplication

• Subtraction

Tags

CCSS.3.OA.A.1

What is the correct result for 9 times 11?

• 2

• 99

• 91

• 20

Tags

CCSS.4.NBT.B.5

Why is the answer 91 incorrect for the division problem?

• 91 is not divisible by 11

• 91 is too small

• 91 is the correct answer

• 91 is too large

Tags

CCSS.4.NBT.B.6

What common mistake might lead someone to incorrectly choose 20 as the answer?

• Dividing instead of adding

• Subtracting instead of adding

• Adding instead of multiplying

• Multiplying instead of dividing

Tags

CCSS.4.NBT.B.6