Rules of Rounding

Rounding is important part of solving the GED Math questions.

This lesson is a part of Onsego GED Prep.

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1. Which one will provide the closest estimate for

\(19.01 \cdot 6.05\)

A.\(19 \cdot 7 = 133\)

B.\(19 \cdot 6 = 114\)

C.\(20 \cdot 6 = 120\)

D.\(20 \cdot 7 = 140\)

Question 1 of 3

2. Round the numbers to the nearest whole ten.
\(724\; \) is approximately ____.

A.\(720\)

B.\(700\)

C.\(730\)

D.\(725\)

Question 2 of 3

3. Jim has traveled \(3,247\; m\) to the city park, then he traveled \(582\; m\) to the drugstore. Then, he traveled \(1,634\; m\) to get back home.

What is the total distance Jim traveled by first rounding each number to the nearest ten.

A.approximately \(5,000\) meters

B.approximately \(5,400\) meters

C.approximately \(5,460\) meters

D.approximately \(5,500\) meters

Question 3 of 3

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Next lesson:

• Basics of Fractions

Video Transcription

Welcome to our lesson on rounding numbers! Today, we’re going to learn about a basic but essential skill in mathematics: rounding.
Rounding is a way to simplify numbers, making them easier to work with or understand, especially when precision is not crucial.
First, let’s understand what rounding means.

Rounding a number means replacing it with another number that is approximately equal but simpler.

For example, rounding 73 to the nearest ten would give us 70, because 73 is closer to 70 than to 80.
Now, how do we round numbers? The rule is simple: look at the digit to the right of the place value you’re rounding to.

If this digit is 5 or more, round up. If it’s less than 5, round down.
Let’s try an example. Round 157 to the nearest ten.

We look at the digit to the right of the ten’s place, which is 7 (in the unit’s place). Since 7 is more than 5, we round up. So, 157 rounded to the nearest ten is 160.

Another example: Round 2.438 to the nearest hundredth. We look at the third decimal place, which is 8. Since 8 is more than 5, we round up the second decimal place, making it 2.44.
Rounding is very useful in daily life.

For instance, when you’re shopping and you want to estimate the total cost of your items quickly. If something costs $4.67, rounding it to $5 makes it easier to calculate in your head.
Or, in cooking, if a recipe calls for 1.7 cups of flour, you might round it to 2 cups for simplicity.

This is especially helpful when precise measurements aren’t necessary.
In summary, rounding is about making numbers simpler to use and understand. It’s a handy tool in mathematics and in everyday situations.

Remember, look at the digit to the right of your desired place value, and round up or down accordingly. With practice, you’ll find rounding becomes second nature!

Last Updated on February 1, 2026.