Chapter 4-2 "Round to Estimate Products"

Front

Do single digit numbers get rounded?

Back

No

Front

A teacher had 34 students in her class. If each student completed 9 math problems, about how many problems would she have to grade altogether?

Back

270 problems

Front

George's school was collecting cans for recycling. They had 81 bags with 5 cans inside each bag. About how many cans did they collect? Choose the expression that shows how to estimate for this problem.

Back

80 x 5

Front

If plane tickets cost $560 each, estimate how much would 4 plane tickets cost? Choose the expression that shows how to estimate for this problem.

Back

600 x 4

Front

Sam was buying extra pencils. He bought 27 packs with each pack having 8 pencils in it. How many pencils did he buy in all? Choose the expression that shows how to estimate for this problem.

Back

30 x 8

Front

What is rounding in mathematics?

Back

Rounding is the process of adjusting a number to make it simpler but keeping its value close to what it was.

Front

Why do we round numbers?

Back

We round numbers to make calculations easier and to estimate values quickly.

Front

What is an estimate?

Back

An estimate is a rough calculation of the value, number, quantity, or extent of something.

Front

What does it mean to estimate a product?

Back

Estimating a product means finding a close value to the actual product by rounding the numbers before multiplying.

Front

How do you round the number 34 to the nearest ten?

Back

34 rounds to 30.