Rounding

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Math FlashRounding

Use rounding• When the question asks you

to estimate.• When the question asks

“about how many”…?• When an exact answer isn’t

possible.• When an answer is difficult to obtain.

Memorize this Poem

Find your number.Look right next door.4 or less just ignore.5 or more, add 1

Round this number to the nearestten thousand.

Find your number.3 6 8,9 7

1Circle the number in the ten thousands place.

Look right next door.

3 6 8,9 7 1

Draw an arrow to the right of the number.

4 or less, just ignore.

3 6 8,9 7 1

8 is larger than 4 so go to the nextline of the poem.

5 or more, add 1 more.

3 6 8,9 7 1Add 1 to the 6.

3 7 0,0 0 0Add 1 to the 6 and all the numbers

to the right of the 7 become 0’s.

The Answer

368,971 rounded to the nearest ten thousand is

3 7 0,0 0 0

Round this number to the nearestthousand.

Find your number.

3 5, 3 2 7Circle the number in the thousands

place.

3 5, 3 2 7Draw an arrow to the right of the

number.

3 5, 3 2 7

Since 3 is less than 4 we do not changethe 5.

3 5, 0 0 0

Change the numbers to left of 5 to 0’s.

The Answer

35,327 rounded to the nearest thousand is

3 5, 0 0 0

Round this number to the nearestdollar.

Find your number.

$ 5. 8 7

Circle the number where the dollarsare.

$ 5. 8 7

Draw an arrow to the right of thecircled number.

$ 5. 8 78 is greater than 4 so go to the next

line of the poem.

$ 5. 8 7Since 8 is greater than 5 add 1 to the

$ 6. 0 0Change the 5 to a 6 and change all the

numbers to the right to 0’s.

The Answer

$5.87 rounded to the

nearest dollar is

$ 6. 0 0

Round this number to the nearesttenth place.

Find your number.

4. 8 7 1Circle the number in the tenths place.

4. 8 7 1Draw an arrow to the right of the

circled number.

4 or less just ignore.

4. 8 7 18 is greater than 4 so go to the next

line of the poem.

4. 8 7 1Since 7 is greater than 5, add 1 to the

4. 9Change the 8 to a 9 and drop the

numbers to the right of the 9.

The Answer

4.871 rounded to the nearest tenth place is

Thanks

Submitted by AshuJaipur

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Rounding

Education

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