Estimating Products of Two-Digit Numbers

The video tutorial explains how to estimate the total sales from ticket sales using rounding and multiplication. It begins with an introduction to the ticket sales scenario, followed by a demonstration of rounding numbers to the nearest ten. The tutorial then introduces a multiplication trick to simplify calculations, leading to an estimated total sales figure. The focus is on mental math techniques for quick estimations.

How many tickets were sold for the play?

• 50 tickets

• 30 tickets

• 40 tickets

• 42 tickets

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CCSS.1.NBT.A.1

What was the price of each ticket?

• $30

• $29

• $25

• $35

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CCSS.3.OA.A.3

To which number is 42 rounded?

• 50

• 45

• 40

• 30

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CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

To which number is 29 rounded?

• 20

• 35

• 25

• 30

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CCSS.3.NBT.A.1

CCSS.4.NBT.A.3

Why do we round numbers in this estimation process?

• To increase accuracy

• To use a calculator

• To simplify calculations

• To learn rounding

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CCSS.5.NBT.B.7

What is the estimated total revenue from ticket sales using rounding?

• $1,300

• $1,200

• $1,180

• $1,250

What multiplication trick is used to estimate the total sales?

• None

• Dividing by ten

• Subtracting zeros

• Adding zeros

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CCSS.4.NBT.B.5

What is the product of 3 and 4 in the context of this estimation?

• 10

• 15

• 12

• 7

What is the purpose of the zeros added in the multiplication trick?

• To adjust the scale of the numbers

• To make numbers smaller

• To confuse the calculation

• To decrease the value

Tags

CCSS.5.NBT.B.5