How do you round 42,783 to the nearest thousand?

4 2 , 7 8 3

l l l l l l l l l l l42,78342,000 43,000

In this lesson you will learn how to use a number line to round numbers to a specified

place within a number.

Let’s ReviewLet’s Review

l l l l l l l l l l l783700 800

Benchmark Numbers

Midpoint

750

Let’s ReviewLet’s Review

l l l l l l l l l l l

5000 60005500

5000 6000

55005001 - 5499 5500 - 5999

Let’s ReviewA Common Mistake

Thinking that the increments on a number line always signify counting by

ones.

l l l l l l l l l 300 400 310 320 330 340 350 360 370 380 390

Let’s ReviewA Common Mistake

Misapplying the concept of “rounding down”.

For example:4,392 = 3,3924,392 = 4,000

Let’s ReviewCore Lesson

Round 42,783 to the nearest hundred.

4 2 , 7 8 3

l l l l l l l l l l l

42,700 42,800

The number rounds up.

Let’s ReviewCore Lesson

Round 42,783 to the nearest ten.

4 2 , 7 8 3

l l l l l l l l l l l

42,780 42,790

The number rounds down.

Let’s ReviewCore Lesson

Round 365,721 to the nearest ten thousand.

3 6 5 , 7 2 1

l l l l l l l l l l l

360,000 370,000

The number rounds up.

In this lesson you have learned how to use a number line to round numbers to a specified

place within a number.

Let’s ReviewGuided Practice

Round 28,578 to the nearest thousand.

Let’s ReviewExtension Activities

In your math journal round 684,528 in multiple ways. Round to the nearest hundred thousand, ten thousand, thousand, hundred, and ten.

Let’s ReviewExtension Activities

Search the newspaper or a magazine for a variety of numbers. Cut out each number and glue them to a piece of paper. Round each number to a variety of places.

For example:

72,468 =

70,00072,00072,50072,470

Let’s ReviewQuick Quiz

Round 1,704,352 to the nearest thousand.

Let’s ReviewQuick Quiz

Round 265,098 to the nearest ten thousand.