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Mr. Gifford’s 5 th Grade Math Lesson #7 Rounding Whole Numbers and Decimals.PowerPoint Presentation

Mr. Gifford’s 5 th Grade Math Lesson #7 Rounding Whole Numbers and Decimals.

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### Mr. Gifford’s 5th Grade Math Lesson #7Rounding Whole Numbers and Decimals.

### Rounding replaces one number with another number that tells ABOUT how many or how much.

### Take this number ABOUT how many or how much.467 and let’s round it to the TENS place.

### 3rd – Finally, make the 6 a 7 and ALL numbers to the right of the digit 6 become 0’s.467

### Let’s try another one. Round of the digit 6 become 0’s.25,401 to the thousands place.

### Round of the digit 6 become 0’s.61.92to the whole number or the ONES place.

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.

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 orSTAY THE SAME.467The seven makes the 6 GO UP!

4

7

0

You do the exact same with decimals.

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

25,401

The digit of the digit 6 become 0’s.4 makes the digit 5 stay the SAME. The rounded number is now

25,000

Let’s try one more before you practice.

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

61.92

The digit of the digit 6 become 0’s.9 makes the digit 1 stay the SAME. The rounded number is now

62.00

Now it is your turn to practice. of the digit 6 become 0’s.

Round 693 to the HUNDREDS place

Round 8.025 to the TENTHS place.

700

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 of the digit 6 become 0’s.2,402,593.801 to the TEN THOUSANDS place.

2,400,000.0

Round 6,972 to the HUNDREDS place.

7,000

Round of the digit 6 become 0’s.54.098 to the HUNDREDTHS place.

Round 604,301.01 to the HUNDRED THOUSANDS place.

54.100 (Remember, you can get rid of the 0’s).

600,000.00

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

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

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

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

All Answers are on the bottom of the above links.

Thank you and see you next lesson.

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