Estimating Quotients Using Compatible Numbers

Miss Frankie from GCMs Elementary School explains lesson 4.5 from the Go Math series, focusing on estimating quotients using compatible numbers. She demonstrates this concept with two examples: 315 divided by 8 and 252 divided by 3. In each example, she identifies multiples of the divisor close to the dividend, adjusts the dividend to a compatible number, and performs the division to find an estimated quotient. The lesson concludes with a preview of a follow-up lesson on finding the range of estimates.

What is the main topic of lesson 4.5 in the Go Math series?

• Finding exact quotients

• Multiplying large numbers

• Estimating quotients using compatible numbers

• Estimating sums using compatible numbers

Why does Miss Frankie list the first five multiples of 8?

• To find the exact answer

• To estimate the quotient

• To simplify the problem

• To check for errors

What is the closest multiple of 8 to the first two digits of 315?

• 16

• 32

• 40

• 24

What is the estimated quotient of 315 divided by 8?

• 40

• 50

• 35

• 45

What is the new problem introduced by Miss Frankie?

• 315 divided by 8

• 320 divided by 8

• 240 divided by 3

• 252 divided by 3

Why does Miss Frankie list multiples of 3 higher than before?

• To make the problem easier

• To find a closer multiple to 25

• To check for errors

• To find the exact answer

What is the closest multiple of 3 to the first two digits of 252?

• 21

• 27

• 30

• 24

What is the estimated quotient of 252 divided by 3?

• 90

• 80

• 70

• 60

Why does Miss Frankie add a zero to the end of the closest multiple?

• To make the problem easier

• To match the place value of the original dividend

• To find the exact answer

• To check for errors

What will the follow-up lesson discuss?

• Finding exact quotients

• Estimating sums

• Finding the two numbers that the estimate is between

• Multiplying large numbers