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

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

Mr. Gifford’s 5 th 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.

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Presentation Transcript

### 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 orSTAY THE SAME.467The 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

4

7

0

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

25,000

Let’s try one more before you practice.

### Round 61.92to 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

62.00

Now it is your turn to practice.

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 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.

Round 604,301.01 to the HUNDRED THOUSANDS place.

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

600,000.00

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