Estimating Quotients in Mental Math

The video tutorial covers lesson 5-3 on using division to estimate quotients. It begins with an introduction to the concept of estimating quotients by rounding dividends and divisors. The tutorial provides various examples and strategies for rounding and estimating, including when rounding is not effective. It also explores advanced estimation techniques and applies these skills to solve real-world math problems. The video concludes with a review of key concepts and practice problems to reinforce learning.

What is the purpose of rounding the dividend when estimating quotients?

• To get the exact answer

• To confuse the students

• To make the numbers larger

• To make the division easier to perform mentally

Why is rounding 1320 to 1300 or 1000 not a good strategy for dividing by 6?

• Because 1320 is already a round number

• Because 1300 and 1000 are not easy to divide by 6 mentally

• Because 1300 and 1000 are too small

• Because 1300 and 1000 are too large

When dividing a four-digit number by a one-digit number, how many digits can the quotient have?

• Four or five digits

• Three or four digits

• One or two digits

• Two or three digits

Tags

CCSS.5.NBT.B.6

CCSS.6.NS.B.2

If you have 4000 divided by 8, what is the quotient?

• 700

• 500

• 400

• 600

Tags

CCSS.4.NBT.B.6

What is the estimated quotient of 3300 divided by 8?

• 500

• 300

• 400

• 600

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CCSS.5.NBT.B.7

How many bags of dog food will Laura's dog eat in one year if it eats one bag every six days?

• 50 bags

• 60 bags

• 70 bags

• 80 bags

Tags

CCSS.6.RP.A.3B

How many miles did the bus driver travel in seven trips if the distance to the museum is 36 miles one way?

• 252 miles

• 504 miles

• 360 miles

• 720 miles

Tags

CCSS.3.OA.D.8

What is the term for operations that undo each other, such as multiplication and division?

• Reciprocal

• Opposite

• Inverse

• Complementary

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

How many hours must Ramon's sister work to earn $7993 if she earns $9 per hour?

• 1000 hours

• 1100 hours

• 900 hours

• 800 hours

Tags

CCSS.5.NBT.B.6

CCSS.6.NS.B.2

How many tables are needed for 231 students if each table seats 8 students?

• 35 tables

• 20 tables

• 25 tables

• 30 tables

Tags

CCSS.5.NBT.B.6

CCSS.6.NS.B.2