2.5 Estimating with Two Digit Divisors

Front

What is estimating in division?

Back

Estimating in division involves finding a close approximation of the quotient by using compatible numbers that are easier to divide.

Front

What are compatible numbers?

Back

Compatible numbers are numbers that are easy to compute with mentally, often rounded to make calculations simpler.

Front

Estimate 568 ÷ 34 using compatible numbers.

Back

600 ÷ 30 = 20.

Front

How do you estimate time using distance and speed?

Back

To estimate time, divide the total distance by the speed to find the approximate time taken.

Front

Estimate the time it takes Jake to run to the park: 5,583 feet at 17 feet per second.

Back

6,000 ÷ 20 = 300 seconds.

Front

What is the formula to estimate the number of floors in a building?

Back

Estimate the height of the building divided by the height of each floor.

Front

Estimate the number of floors in a building that is 1,848 feet tall with each floor being 14 feet high.

Back

1,800 ÷ 15 = 120 floors.

Front

How do you estimate the number of cubes used in a tower?

Back

Estimate the total height of the tower divided by the height of each cube.

Front

Estimate the number of cubes in a tower that is 594 millimeters tall with each cube being 17 millimeters high.

Back

594 ÷ 20 = 30 cubes.

Front

What is a multi-step estimation problem?

Back

A multi-step estimation problem requires multiple calculations to arrive at the final estimate.