Rounding Rounding NumbersNumbers

Prepared by Mr. Jerly Cayanan

When do you use When do you use rounding?rounding?

•When the question asks you to round. •When the question asks you to estimate.• When the question asks “about how many”…?• To find out ABOUT what your answer should be.

Memorize this PoemMemorize this Poem

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

Round this number to the Round this number to the nearestnearest

tenten..Find your number. 9 7 8

Circle the number in the tens place.

Round this number to the Round this number to the nearestnearest

tenten..Look right next door.

9 7 8

Draw an arrow to the right of the number.

Round this number to the Round this number to the nearestnearest

tenten..4 or less, just ignore.

9 7 8

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

Round this number to the Round this number to the nearestnearest

tenten..5 or more, add 1 more.

9 7 8Add 1 to the 7.

+1

Round this number to the Round this number to the nearestnearest

tenten..5 or more, add 1 more.

9 8 0Add 1 to the 7 and all the

numbers to the right of the 8 become 0’s.

The AnswerThe Answer

978 rounded to the nearest ten is

980

Round this number to the Round this number to the nearestnearest

hundredhundred..Find your number.

3 2 7Circle the number in the hundreds

place.

Round this number to the Round this number to the nearestnearest

hundredhundred..Look right next door.

3 2 7Draw an arrow to the right of the

number.

Round this number to the Round this number to the nearestnearest

hundredhundred..4 or less, just ignore.

3 2 7

Since 2 is less than 4 we do not change the 3.

Round this number to the Round this number to the nearestnearest

hundredhundred..4 or less, just ignore.3 0 0

Change the numbers to right

of 3 to 0’s.

The AnswerThe Answer

327 rounded to the nearest hundred is

3 0 0

That’s all, folks!!!