Exploring Multiplication Comparisons in 4th Grade Math

This video tutorial covers multiplication comparisons, focusing on modeling and solving problems using multiplication. It explains the commutative property and differentiates between additive and multiplicative comparisons. The tutorial includes examples and exercises to illustrate how to write comparison sentences and equations, and concludes with a complex problem-solving exercise to apply the learned concepts.

What does the commutative property of multiplication state?

• You can divide two numbers in any order and get the same quotient.

• You can add two numbers in any order and get the same sum.

• You can multiply two factors in any order and get the same product.

• You can subtract two numbers in any order and get the same difference.

If Carly has 9 pennies and Jack has four times as many, how many pennies does Jack have?

• 45

• 18

• 27

• 36

How is the equation '4 is two more than 2' different from '4 is two times as many as 2'?

• The first is a multiplication comparison, the second is an addition comparison.

• Both are addition comparisons.

• The first is an addition comparison, the second is a multiplication comparison.

• Both are multiplication comparisons.

Miguel has 6 rabbits, which is three times as many as Sarah. How many rabbits does Sarah have?

• 2

• 3

• 1

• 4

If there are 8 students in the art club and three times as many in the chorus, how many students are in the chorus?

• 24

• 40

• 32

• 16

What is the equation for '21 is seven times as many as 3'?

• 21 = 3 + 7

• 21 = 7 + 3

• 21 = 7 * 3

• 21 = 3 * 7

If Nando has 4 goldfish and Joe has 3, how many goldfish does Cooper have if he has two times as many as Nando and Joe combined?

• 16

• 14

• 10

• 7

How many baseball cards does Han have if Luca has 72 cards, which is eight times as many as Han?

• 10

• 11

• 9

• 8

What is the comparison sentence for the equation '18 = 9 * 2'?

• 18 is nine more than two.

• 18 is two times as many as nine.

• 18 is nine times as many as two.

• 18 is two more than nine.

If Sarah's dogs get four times the amount of food that the cats get, and the cats get 3 cups per day, how many cups do the dogs get?

• 12

• 9

• 10

• 11