Estimating Products in Mathematics

The video tutorial explains the concept of estimating products in multiplication. It begins with an introduction to estimation as an educated guess and its role in ensuring reasonable answers. The tutorial provides examples, such as estimating the products of 4 x 26, 5 x 37, and 6 x 95, by rounding numbers to the nearest ten. It also includes a word problem involving a library to demonstrate practical application. The video emphasizes the importance of estimation in verifying the reasonableness of calculated answers.

What is the purpose of estimating a product before solving it?

• To ensure the answer is reasonable

• To make the problem easier

• To get the exact answer

• To avoid solving the problem

Tags

CCSS.4.NBT.B.5

When rounding 26 to the nearest 10, what number do we get?

• 35

• 20

• 25

• 30

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

What is the estimated product of 4 and 26 after rounding?

• 140

• 80

• 120

• 100

Tags

CCSS.4.NBT.B.5

When rounding 37 to the nearest 10, what number do we get?

• 40

• 35

• 30

• 45

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

What is the estimated product of 5 and 37 after rounding?

• 200

• 180

• 150

• 220

Tags

CCSS.4.NBT.B.5

When rounding 95 to the nearest 10, what number do we get?

• 105

• 90

• 95

• 100

Tags

CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

What is the estimated product of 6 and 95 after rounding?

• 600

• 550

• 500

• 650

Tags

CCSS.4.NBT.B.5

In the word problem, how many days is the library open in a month?

• 25

• 26

• 27

• 28

Tags

CCSS.2.OA.A.1

How many new books does the library receive each day?

• 5

• 4

• 6

• 7

Tags

CCSS.1.OA.A.1

What is the estimated total number of new books the library receives in a month?

• 180

• 170

• 160

• 150