Eureka Math Grade 3 Module 2 Review

Front

What is estimation in mathematics?

Back

Estimation is a method used to find an approximate value that is close to the actual amount, often used when exact calculations are not necessary.

Front

How do you estimate to the nearest ten?

Back

To estimate to the nearest ten, look at the ones digit. If it is 5 or more, round up; if it is 4 or less, round down.

Front

What is the estimated total of 347 mL over 3 days to the nearest ten?

Back

1,050 mL (347 rounds to 350, and 350 x 3 = 1,050).

Front

What is the process to estimate to the nearest hundred?

Back

To estimate to the nearest hundred, look at the tens digit. If it is 5 or more, round up; if it is 4 or less, round down.

Front

What is the estimated total of 257 mL and 519 mL to the nearest hundred?

Back

800 mL (257 rounds to 300 and 519 rounds to 500, and 300 + 500 = 800).

Front

How do you calculate time after a certain duration?

Back

To calculate time after a duration, add the duration to the starting time, adjusting for minutes and hours as necessary.

Front

If Meleah leaves school at 4:12 p.m. and stops for 23 minutes, what time does she leave the grocery store?

Back

4:35 p.m. (4:12 + 23 minutes = 4:35).

Front

What is the total time for three third graders to get through the lunch line if one takes 35 seconds?

Back

120 seconds or 2 minutes (35 seconds x 3 = 105 seconds, which rounds to 120 seconds).

Front

How do you add minutes to a specific time?

Back

When adding minutes, if the total exceeds 60, convert the excess into hours and add to the hour part of the time.

Front

If the third graders earned 17 minutes of free time starting at 2:24, what time will it end?

Back

2:41 (2:24 + 17 minutes = 2:41).