Mr. Gifford’s 5th Grade Math

Lesson #7

Rounding Whole Numbers and Decimals.

Rounding replaces one number with another number that tells

ABOUT how many or how much.

When you round a number remember this: If the place

value you are rounding is a 0 – 4 the number stays the same.

Numbers 5 – 9 the number goes up.

Take this number467 and let’s round it to

the TENS place.

1st - Underline the place value you are rounding to. In this

case the TENS place.467

2nd- Ask the number, or NEIGHBOR, to the right if it can make the underlined digit GO UP or STAY THE SAME.

467

The seven makes the 6 GO UP!

3rd – Finally, make the 6 a 7 and ALL numbers to the right of the digit 6 become 0’s.

467

470

You do the exact same with decimals.

Let’s try another one. Round 25,401 to the

thousands place.

Ask the number, NEIGHBOR, to the right if it can make the thousands place go UP or

stays the SAME.25,401

The digit 4 makes the digit 5 stay the SAME. The rounded

number is now25,000

Let’s try one more before you practice.

Round 61.92

to the whole number or the ONES place.

Ask the number, NEIGHBOR, to the right if it can make the thousands place go UP or

stays the SAME.61.92

The digit 9 makes the digit 1 stay the SAME. The rounded

number is now62.00

Now it is your turn to practice.

Round 693 to the HUNDREDS

place700

Round 8.025 to the TENTHS

place.8.000 or 8.0

( You can leave off the other

0’s AFTER THE DECIMAL they have no value but just hold a

place).

Round 2,402,593.801 to the TEN THOUSANDS place.

2,400,000.0

Round 6,972 to the HUNDREDS place.

7,000

Round 54.098 to the

HUNDREDTHS place. 54.100

(Remember, you can get rid of the

0’s).

Round 604,301.01 to the HUNDRED THOUSANDS

place.

600,000.00

Good work. Go to the links below to assess what you have learned.

Thank you and see you next lesson.

http://www.superteacherworksheets.com/rounding/rounding-tens-hundreds.pdf

http://www.superteacherworksheets.com/rounding/rounding-to-the-nearest-thousand.pdf

http://www.superteacherworksheets.com/rounding/rounding-hundredths--tenths.pdf

All Answers are on the bottom of the above links.