Assessment Practice MA.3.NSO.1.4

Round 745. For each box, fill in the bubble before the number that is correct.
745 rounded to the nearest ten is​ (a)  

745 rounded to the nearest hundred is​​ (b)  

• 740

• 800

• 750
• 700
• 760

Answer explanation

What is Rounding?

Rounding is a way to make numbers easier to work with by changing them to the nearest ten or hundred.

Rounding to the Nearest Ten:

1. Look at the ones place (the last digit).

2. If the ones digit is 5 or higher, round up. This means you add 1 to the tens place.

3. If the ones digit is 4 or lower, round down. Keep the tens place the same.

Example:

• For 47: The ones digit is 7 (round up to 50).

• For 42: The ones digit is 2 (round down to 40).

Rounding to the Nearest Hundred:

1. Look at the tens place (the second digit from the right).

2. If the tens digit is 5 or higher, round up to the next hundred.

3. If the tens digit is 4 or lower, round down.

Example:

• For 265: Round up to 300.

• For 234: Round down to 200.

Tags

MA.3.NSO.1.4

Round 992. For each box, fill in the bubble before the number that is correct.
992 rounded to the nearest ten​ (a)   .

992 rounded to the nearest hundred is​​ (b)   .

• 1000
• 990
• 900
• 980

Answer explanation

What is Rounding?

Rounding is a way to make numbers easier to work with by changing them to the nearest ten or hundred.

Rounding to the Nearest Ten:

1. Look at the ones place (the last digit).

2. If the ones digit is 5 or higher, round up. This means you add 1 to the tens place.

3. If the ones digit is 4 or lower, round down. Keep the tens place the same.

Example:

• For 47: The ones digit is 7 (round up to 50).

• For 42: The ones digit is 2 (round down to 40).

Rounding to the Nearest Hundred:

1. Look at the tens place (the second digit from the right).

2. If the tens digit is 5 or higher, round up to the next hundred.

3. If the tens digit is 4 or lower, round down.

Example:

• For 265: Round up to 300.

• For 234: Round down to 200.

Tags

MA.3.NSO.1.4

A mystery number rounded to the nearest ten is 570. Which is the least and greatest values for the mystery number?
The least number is​ (a)   .

The greatest number is​ (b)   .

• 565
• 564
• 576
• 566
• 575
• 574

Answer explanation

What is Rounding?

Rounding is a way to make numbers easier to work with by changing them to the nearest ten or hundred.

Rounding to the Nearest Ten:

1. Look at the ones place (the last digit).

2. If the ones digit is 5 or higher, round up. This means you add 1 to the tens place.

3. If the ones digit is 4 or lower, round down. Keep the tens place the same.

Example:

• For 47: The ones digit is 7 (round up to 50).

• For 42: The ones digit is 2 (round down to 40).

Rounding to the Nearest Hundred:

1. Look at the tens place (the second digit from the right).

2. If the tens digit is 5 or higher, round up to the next hundred.

3. If the tens digit is 4 or lower, round down.

Example:

• For 265: Round up to 300.

• For 234: Round down to 200.

Tags

MA.3.NSO.1.4

Match each number on the left to the number of the nearest hundred that it rounds to.

• 200

• 212

• 800

• 255

• 500

• 531

• 300

• 778

Answer explanation

What is Rounding?

Rounding is a way to make numbers easier to work with by changing them to the nearest ten or hundred.

Rounding to the Nearest Ten:

1. Look at the ones place (the last digit).

2. If the ones digit is 5 or higher, round up. This means you add 1 to the tens place.

3. If the ones digit is 4 or lower, round down. Keep the tens place the same.

Example:

• For 47: The ones digit is 7 (round up to 50).

• For 42: The ones digit is 2 (round down to 40).

Rounding to the Nearest Hundred:

1. Look at the tens place (the second digit from the right).

2. If the tens digit is 5 or higher, round up to the next hundred.

3. If the tens digit is 4 or lower, round down.

Example:

• For 265: Round up to 300.

• For 234: Round down to 200.

Tags

MA.3.NSO.1.4

1. Which number becomes greater when rounded to the nearest ten and the nearest hundred?

• 1. 272

• 1. 586

• 1. 736

• 1. 808

Answer explanation

What is Rounding?

Rounding is a way to make numbers easier to work with by changing them to the nearest ten or hundred.

Rounding to the Nearest Ten:

1. Look at the ones place (the last digit).

2. If the ones digit is 5 or higher, round up. This means you add 1 to the tens place.

3. If the ones digit is 4 or lower, round down. Keep the tens place the same.

Example:

• For 47: The ones digit is 7 (round up to 50).

• For 42: The ones digit is 2 (round down to 40).

Rounding to the Nearest Hundred:

1. Look at the tens place (the second digit from the right).

2. If the tens digit is 5 or higher, round up to the next hundred.

3. If the tens digit is 4 or lower, round down.

Example:

• For 265: Round up to 300.

• For 234: Round down to 200.

Tags

MA.3.NSO.1.4

1. Julia rounds a mystery number to the nearest ten and gets 500. Ana rounds the same mystery number to the nearest hundred and gets 500. Select all possible numbers that can be the mystery number.

• 1. 492

• 1. 499

• 1. 503

• 1. 506

• 1. 494

Answer explanation

What is Rounding?

Rounding is a way to make numbers easier to work with by changing them to the nearest ten or hundred.

Rounding to the Nearest Ten:

1. Look at the ones place (the last digit).

2. If the ones digit is 5 or higher, round up. This means you add 1 to the tens place.

3. If the ones digit is 4 or lower, round down. Keep the tens place the same.

Example:

• For 47: The ones digit is 7 (round up to 50).

• For 42: The ones digit is 2 (round down to 40).

Rounding to the Nearest Hundred:

1. Look at the tens place (the second digit from the right).

2. If the tens digit is 5 or higher, round up to the next hundred.

3. If the tens digit is 4 or lower, round down.

Example:

• For 265: Round up to 300.

• For 234: Round down to 200.

Tags

MA.3.NSO.1.4

1. A number was rounded to the nearest ten and the result was 220. Write the least possible number that it could have been.

Mathematical Equivalence

ON

Answer explanation

What is Rounding?

Rounding is a way to make numbers easier to work with by changing them to the nearest ten or hundred.

Rounding to the Nearest Ten:

1. Look at the ones place (the last digit).

2. If the ones digit is 5 or higher, round up. This means you add 1 to the tens place.

3. If the ones digit is 4 or lower, round down. Keep the tens place the same.

Example:

• For 47: The ones digit is 7 (round up to 50).

• For 42: The ones digit is 2 (round down to 40).

Rounding to the Nearest Hundred:

1. Look at the tens place (the second digit from the right).

2. If the tens digit is 5 or higher, round up to the next hundred.

3. If the tens digit is 4 or lower, round down.

Example:

• For 265: Round up to 300.

• For 234: Round down to 200.

Tags

MA.3.NSO.1.4

A number was rounded to the nearest hundred and the result was 800. Write the greatest possible number that it could have been.

Mathematical Equivalence

OFF

Answer explanation

What is Rounding?

Rounding is a way to make numbers easier to work with by changing them to the nearest ten or hundred.

Rounding to the Nearest Ten:

1. Look at the ones place (the last digit).

2. If the ones digit is 5 or higher, round up. This means you add 1 to the tens place.

3. If the ones digit is 4 or lower, round down. Keep the tens place the same.

Example:

• For 47: The ones digit is 7 (round up to 50).

• For 42: The ones digit is 2 (round down to 40).

Rounding to the Nearest Hundred:

1. Look at the tens place (the second digit from the right).

2. If the tens digit is 5 or higher, round up to the next hundred.

3. If the tens digit is 4 or lower, round down.

Example:

• For 265: Round up to 300.

• For 234: Round down to 200.

Tags

MA.3.NSO.1.4

1. Select all the numbers that round to 310 when rounded to the nearest ten.

• 1. 304

• 1. 305

• 1. 309

• 1. 312

• 1. 315

Answer explanation

What is Rounding?

Rounding is a way to make numbers easier to work with by changing them to the nearest ten or hundred.

Rounding to the Nearest Ten:

1. Look at the ones place (the last digit).

2. If the ones digit is 5 or higher, round up. This means you add 1 to the tens place.

3. If the ones digit is 4 or lower, round down. Keep the tens place the same.

Example:

• For 47: The ones digit is 7 (round up to 50).

• For 42: The ones digit is 2 (round down to 40).

Rounding to the Nearest Hundred:

1. Look at the tens place (the second digit from the right).

2. If the tens digit is 5 or higher, round up to the next hundred.

3. If the tens digit is 4 or lower, round down.

Example:

• For 265: Round up to 300.

• For 234: Round down to 200.

Tags

MA.3.NSO.1.4

Which of the following is equal to 600 when rounded to the nearest hundred? Select all that apply.

• 664

• 542

• 637

• 650

• 551

Answer explanation

What is Rounding?

Rounding is a way to make numbers easier to work with by changing them to the nearest ten or hundred.

Rounding to the Nearest Ten:

1. Look at the ones place (the last digit).

2. If the ones digit is 5 or higher, round up. This means you add 1 to the tens place.

3. If the ones digit is 4 or lower, round down. Keep the tens place the same.

Example:

• For 47: The ones digit is 7 (round up to 50).

• For 42: The ones digit is 2 (round down to 40).

Rounding to the Nearest Hundred:

1. Look at the tens place (the second digit from the right).

2. If the tens digit is 5 or higher, round up to the next hundred.

3. If the tens digit is 4 or lower, round down.

Example:

• For 265: Round up to 300.

• For 234: Round down to 200.

Tags

MA.3.NSO.1.4