4th Grade Math - Round Multi-Digit Numbers: CCSS.Math.Content.4.NBT.A.3

1

Round to the nearest ten.

Explanation

When we round a number to the nearest ten we look to the ones place to tell us if we round up or down.

$91{\color{Blue} 9}$

If the number in our ones place is or greater, we round up. If the number in the ones place is or less, we round down. When we round up, the number in the tens place increases by and all the other numbers to the right become . When we round down, the number in the tens place stays the same and all the other numbers to the right become .

In this case, is greater than so our rounded number is

2

Round $3\textup,222$ to the nearest hundred.

$3\textup,100$

$3\textup,200$

$3\textup,000$

$3\textup,300$

$3\textup,020$

Explanation

When we round a number to the nearest hundred we look to the tens place to tell us if we round up or down.

$3\textup,2{\color{Blue} 2}2$

If the number in our tens place is or greater, we round up. If the number in the tens place is or less, we round down. When we round up, the number in the hundreds place increases by and all the other numbers to the right become . When we round down, the number in the hundreds place stays the same and all the other numbers to the right become .

In this case, is less than so our rounded number is $3\textup,200$

3

Round $7\textup,408$ to the nearest hundred.

$7\textup,400$

$7\textup,300$

$7\textup,308$

$7\textup,407$

$7\textup,000$

Explanation

When we round a number to the nearest hundred we look to the tens place to tell us if we round up or down.

$7\textup,4{\color{Blue} 0}8$

If the number in our tens place is or greater, we round up. If the number in the tens place is or less, we round down. When we round up, the number in the hundreds place increases by and all the other numbers to the right become . When we round down, the number in the hundreds place stays the same and all the other numbers to the right become .

In this case, is less than so our rounded number is $7\textup,400$

4

Round $4\textup,623$ to the nearest hundred.

$4\textup,600$

$4\textup,500$

$4\textup,700$

$4\textup,620$

$4\textup,630$

Explanation

When we round a number to the nearest hundred we look to the tens place to tell us if we round up or down.

$4\textup,6{\color{Blue} 2}3$

If the number in our tens place is or greater, we round up. If the number in the tens place is or less, we round down. When we round up, the number in the hundreds place increases by and all the other numbers to the right become . When we round down, the number in the hundreds place stays the same and all the other numbers to the right become .

In this case, is less than so our rounded number is $4\textup,600$

5

Round $63\textup,267$ to the nearest ten.

$63\textup,270$

$63\textup,260$

$63\textup,300$

$63\textup,200$

$63\textup,250$

Explanation

When we round a number to the nearest ten we look to the ones place to tell us if we round up or down.

$63\textup,26{\color{Blue} 7}$

If the number in our ones place is or greater, we round up. If the number in the ones place is or less, we round down. When we round up, the number in the tens place increases by and all the other numbers to the right become . When we round down, the number in the tens place stays the same and all the other numbers to the right become .

In this case, is greater than so our rounded number is $63\textup,270$

6

Round $349\textup,423$ to the nearest ten.

$349\textup,000$

$349\textup,420$

$349\textup,410$

$349\textup,450$

$349\textup,430$

Explanation

When we round a number to the nearest ten we look to the ones place to tell us if we round up or down.

$349\textup,42{\color{Blue} 3}$

If the number in our ones place is or greater, we round up. If the number in the ones place is or less, we round down. When we round up, the number in the tens place increases by and all the other numbers to the right become . When we round down, the number in the tens place stays the same and all the other numbers to the right become .

In this case, is less than so our rounded number is $349\textup,420$ .

7

Round to the nearest hundred.

Explanation

When we round a number to the nearest hundred we look to the tens place to tell us if we round up or down.

$7{\color{Blue} 2}5$

If the number in our tens place is or greater, we round up. If the number in the tens place is or less, we round down. When we round up, the number in the hundreds place increases by and all the other numbers to the right become . When we round down, the number in the hundreds place stays the same and all the other numbers to the right become .

In this case, is less than so our rounded number is

8

Round to the nearest ten.

Explanation

When we round a number to the nearest hundred we look to the tens place to tell us if we round up or down.

$84{\color{Blue} 9}$

If the number in our tens place is or greater, we round up. If the number in the tens place is or less, we round down. When we round up, the number in the hundreds place increases by and all the other numbers to the right become . When we round down, the number in the hundreds place stays the same and all the other numbers to the right become .

In this case, is greater than so our rounded number is

9

Round $21\textup,896$ to the nearest thousand.

$22\textup,000$

$21\textup,000$

$21\textup,800$

$21\textup,900$

$21\textup,890$

Explanation

When we round a number to the nearest thousand we look to the hundreds place to tell us if we round up or down.

$21\textup,{\color{Blue} 8}96$

If the number in our hundreds place is or greater, we round up. If the number in the hundreds place is or less, we round down. When we round up, the number in the thousands place increases by and all the other numbers to the right become . When we round down, the number in the thousands place stays the same and all the other numbers to the right become .

In this case, is greater than so our rounded number is $22\textup,000$

10

Round $2\textup,126$ to the nearest hundred.

$2\textup,100$

$2\textup,200$

$2\textup,000$

$1\textup,000$

$1\textup,100$

Explanation

When we round a number to the nearest hundred we look to the tens place to tell us if we round up or down.

$2\textup,1{\color{Blue} 2}6$

If the number in our tens place is or greater, we round up. If the number in the tens place is or less, we round down. When we round up, the number in the hundreds place increases by and all the other numbers to the right become . When we round down, the number in the hundreds place stays the same and all the other numbers to the right become .

In this case, is less than so our rounded number is $2\textup,100$

Round Multi-Digit Numbers: CCSS.Math.Content.4.NBT.A.3

Help Questions

Explanation

Explanation

Explanation

Explanation

Explanation

Explanation

Explanation

Explanation

Explanation

Explanation