Steply

Round to the nearest 10, 100, 1000

Elementary · 20 problems, easy to harder

▶ Watch the first one solved

How we do it

  1. Find the two tens
  2. Find the closer one
  3. Check

The steps for Use a number line to round 47 to the nearest 10. Every solution names its steps, so you always know what comes next.

Worked examples

Use a number line to round 47 to the nearest 10 Easy

The question

Question: round 47 to the nearest ten.

Round 47 to the nearest ten

1 Find the two tens

2 Find the closer one

47 is closer to 50.

So 47 rounded to the nearest ten is 50.

The sign ≈ means about.

= 47 ≈ 50

3 Check

We check with the digits.

The next digit after the tens is 7.

5 or more rounds up.

Yes!

It works.

tens digit 4, next digit 7: 5 or more → up

Let's look back.

First: find the two tens.

Then: find the closer one.

Last: check.

Answer
= 47 ≈ 50

▶ Watch it solved

Round 145 to the nearest 10 on a number line Medium

The question

Question: round 145 to the nearest ten.

Round 145 to the nearest ten

1 Find the two tens

2 Find the closer one

145 is exactly halfway.

Halfway rounds up, to 150.

So 145 rounded to the nearest ten is 150.

The sign ≈ means about.

= 145 ≈ 150

3 Check

We check with the digits.

The next digit after the tens is 5.

5 or more rounds up.

Yes!

It works.

tens digit 4, next digit 5: 5 or more → up

Let's look back.

First: find the two tens.

Then: find the closer one.

Last: check.

Answer
= 145 ≈ 150

▶ Watch it solved

Use a number line to round 2,650 to the nearest 100 Harder

The question

Question: round 2,650 to the nearest hundred.

Round 2,650 to the nearest hundred

1 Find the two hundreds

2 Find the closer one

2,650 is exactly halfway.

Halfway rounds up, to 2,700.

So 2,650 rounded to the nearest hundred is 2,700.

The sign ≈ means about.

= 2,650 ≈ 2,700

3 Check

We check with the digits.

The next digit after the hundreds is 5.

5 or more rounds up.

Yes!

It works.

hundreds digit 6, next digit 5: 5 or more → up

Let's look back.

First: find the two hundreds.

Then: find the closer one.

Last: check.

Answer
= 2,650 ≈ 2,700

▶ Watch it solved

Practice

Try each one, then open the answer. Stuck? Open the problem to watch every step.

Easy

  1. use a number line to round 47 to the nearest 10
    Answer
    = 47 ≈ 50
  2. use a number line to round 32 to the nearest 10
    Answer
    = 32 ≈ 30
  3. use a number line to round 68 to the nearest 10
    Answer
    = 68 ≈ 70
  4. use a number line to round 85 to the nearest 10
    Answer
    = 85 ≈ 90
  5. use a number line to round 21 to the nearest 10
    Answer
    = 21 ≈ 20
  6. use a number line to round 54 to the nearest 10
    Answer
    = 54 ≈ 50
  7. use a number line to round 73 to the nearest 10
    Answer
    = 73 ≈ 70

Medium

  1. round 145 to the nearest 10 on a number line
    Answer
    = 145 ≈ 150
  2. use a number line to round 352 to the nearest 100
    Answer
    = 352 ≈ 400
  3. use a number line to round 678 to the nearest 100
    Answer
    = 678 ≈ 700
  4. use a number line to round 25 to the nearest 10
    Answer
    = 25 ≈ 30
  5. use a number line to round 750 to the nearest 100
    Answer
    = 750 ≈ 800
  6. use a number line to round 1,234 to the nearest 100
    Answer
    = 1,234 ≈ 1,200
  7. use a number line to round 4,780 to the nearest 1000
    Answer
    = 4,780 ≈ 5,000

Harder

  1. use a number line to round 2,650 to the nearest 100
    Answer
    = 2,650 ≈ 2,700
  2. use a number line to round 3,499 to the nearest 1000
    Answer
    = 3,499 ≈ 3,000
  3. use a number line to round 6,500 to the nearest 1000
    Answer
    = 6,500 ≈ 7,000
  4. use a number line to round 95 to the nearest 10
    Answer
    = 95 ≈ 100
  5. use a number line to round 9,960 to the nearest 100
    Answer
    = 9,960 ≈ 10,000
  6. use a number line to round 999 to the nearest 10
    Answer
    = 999 ≈ 1,000