Number & Operations in Base Ten

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3rd Grade Math › Number & Operations in Base Ten

Questions 1 - 10
1

What is rounded to the nearest hundred?

Explanation

When we round a number to the hundreds place we look to our tens place to tell us if we round up or down. 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 become . When we round down, the number in the hundreds place stays the same and all the other numbers become .

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

2

What is rounded to the nearest hundred?

Explanation

When we round a number to the hundreds place we look to our tens place to tell us if we round up or down. 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 become . When we round down, the number in the hundreds place stays the same and all the other numbers become .

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

3

What is rounded to the nearest hundred?

Explanation

When we round a number to the hundreds place we look to our tens place to tell us if we round up or down. 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 become . When we round down, the number in the hundreds place stays the same and all the other numbers become .

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

4

What is rounded to the nearest hundred?

Explanation

When we round a number to the hundreds place we look to our tens place to tell us if we round up or down. 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 become . When we round down, the number in the hundreds place stays the same and all the other numbers become .

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

5

What is rounded to the nearest hundred?

Explanation

When we round a number to the hundreds place we look to our tens place to tell us if we round up or down. 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 become . When we round down, the number in the hundreds place stays the same and all the other numbers become .

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

6

What is rounded to the nearest hundred?

Explanation

When we round a number to the hundreds place we look to our tens place to tell us if we round up or down. 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 become . When we round down, the number in the hundreds place stays the same and all the other numbers become .

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

7

Solve:

Explanation

When we add with multi-digit numbers, we start with the numbers in the ones place, and then move to the left to the tens place, followed by the hundreds place.

Add the numbers in the ones place:

Add the numbers in the tens place:

Add the numbers in the hundreds place:

Your final answer should be

8

Solve:

Explanation

When we add with multi-digit numbers, we start with the numbers in the ones place, and then move to the left to the tens place, followed by the hundreds place.

Add the numbers in the ones place:

Add the numbers in the tens place:

Add the numbers in the hundreds place:

Your final answer should be

9

Solve:

Explanation

When we add with multi-digit numbers, we start with the numbers in the ones place, and then move to the left to the tens place, followed by the hundreds place.

Add the numbers in the ones place:

Add the numbers in the tens place:

Add the numbers in the hundreds place:

Your final answer should be

10

Solve:

Explanation

When we add with multi-digit numbers, we start with the numbers in the ones place, and then move to the left to the tens place, followed by the hundreds place.

Add the numbers in the ones place:

Add the numbers in the tens place:

Add the numbers in the hundreds place:

Your final answer should be

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