Division of Round Numbers

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What is a round number?

A round number is a number that ends in one or more zeros, such as 10, 100, or 1000.

What is the result of dividing 100 by 10?

The result is 10.

Divide 300 by 50.

300 divided by 50 is 6.

How do you divide round numbers easily?

You can cancel the zeros at the end and then divide the smaller numbers.

If you divide 400 by 20, what is the quotient?

The quotient is 20.

Why are round numbers easy to divide?

Because you can simplify division by canceling out the zeros first.

Divide 600 by 200 and find the quotient.

600 divided by 200 is 3.

What happens to the zeros when dividing round numbers?

You can cancel zeros from both the dividend and divisor before dividing.

Divide 8000 by 400.

8000 divided by 400 is 20.

Explain division when you have 1000 divided by 250.

First simplify by canceling zeros and divide 100 by 25, which gives 4.

What does it mean to simplify a division problem with round numbers?

It means removing equal numbers of zeros from both numbers before dividing.

Divide 500 by 100.

500 divided by 100 is 5.

Find the quotient of 9000 divided by 300.

The quotient is 30.

Why might someone choose to work with round numbers in division?

Round numbers make calculations simpler and quicker.

When dividing 2000 by 400, what strategy might you use?

Cancel zeros first, then divide the smaller numbers 20 by 4 to get 5.




Test Your Knowledge

Select the correct option


1. Which of the following best describes a round number?

A number that ends in one or more zeros, such as 10, 100, or 1000.

A prime number that cannot be divided by any number except 1 and itself.

A number that is a perfect square.

A number that can be evenly divided by any single digit number.

2. What is the result of dividing 100 by 10?

5

15

10

0

3. Divide 300 by 50. What is the quotient?

6

5

7

8

4. How can you easily divide round numbers like 600 by 200?

Cancel the zeros and divide the smaller numbers.

Subtract the smaller number from the larger one.

Multiply the smaller number by itself.

Add zeros to the smaller number.

5. If you divide 400 by 20, what is the quotient?

15

10

30

20

6. When dividing 8000 by 400, what is the resulting quotient?

200

40

50

20

7. What strategy might you use to divide 2000 by 400?

Cancel zeros, then divide 20 by 4 to get 5.

Subtract 400 from 2000 repeatedly until reaching 0.

Multiply both numbers by 10 before division.

Add zeros to 400 and then divide.