Lesson 6.2

Multiple Choice

A school gymnasium is 34.5 feet by 40.5 feet. What is its area?

• 75 square feet

• 7450 square feet

• 1,397.25 square feet

• 13,972.5 square feet

​I Can: underestimate and overestimate to check the reasonableness of answers.

Open Ended

Sandi says that her family of 4 will go to the park 3 times this year. She says they will save about $200 if they buy the season pass. Use estimation to determine whether her statement is reasonable.

Open Ended

Estimate $$-3.8\cdot3-\frac{117}{20}$$ using integers. Tell whether your estimate is an underestimate or an overestimate.

Math Response

Tasha and Lydia have a yard-service company. Their last three jobs brought in $287.50, $184.25, and $95. Lydia worked about 65% of the hours on those jobs. Use compatible numbers to estimate Lydia’s share of the earnings.

Money earned from jobs:

$287.50 + $184.25 + $95

Estimated money earned:

Type answer here

Correct Answer: 400

Deg^°

Rad

Open Ended

The soccer club held a spaghetti dinner. They sold 39 child tickets for $3.75 each and 27 adult tickets for $5.95 each. The amount for 11 child tickets was refunded.

A. Estimate the amount of income received by the soccer club.

B. Was the estimate for the amount of income in Problem 1 an overestimate or underestimate? Explain.

Math Response

Mrs. Gomez earns $19.50 per hour and gets a 5% raise. Use compatible numbers to estimate her new hourly rate. Explain.

Type answer here

Correct Answer: 21

Deg^°

Rad

Open Ended

A store discounts all purchases 10% off the listed price. There is no sales tax. Luigi has $20. He thinks he can buy 11 pairs of socks at $1.89 a pair before the 10% discount.    Use estimation to decide if that is reasonable.

Poll

Rate your level of understanding:

• 1. I can state the definition of an estimate.

• 2. I can classify underestimates or overestimates.

• 3. I can use underestimates and overestimates to check the reasonableness of answers.

• 4.I can use underestimates or overestimates to check the reasonableness of answers and explain my choices.