2. When do you use rounding?When do you use 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.
3. Memorize this PoemMemorize this Poem
Find your number.
Look right next door.
4 or less just ignore.
5 or more, add 1 more.
4. Round this number to theRound this number to the
nearestnearest
tenten..
Find your number.
9 7 8
Circle the number in the tens
place.
5. Round this number to theRound this number to the
nearestnearest
tenten..
Look right next door.
9 7 8
Draw an arrow to the right of the
number.
6. Round this number to theRound 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.
7. Round this number to theRound this number to the
nearestnearest
tenten..
5 or more, add 1 more.
9 7 8
Add 1 to the 7.
+1
8. Round this number to theRound this number to the
nearestnearest
tenten..
5 or more, add 1 more.
9 8 0
Add 1 to the 7 and all the
numbers to the right of the 8
become 0’s.
10. Round this number to theRound this number to the
nearestnearest
hundredhundred..
Find your number.
3 2 7
Circle the number in the hundreds
place.
11. Round this number to theRound this number to the
nearestnearest
hundredhundred..
Look right next door.
3 2 7
Draw an arrow to the right of the
number.
12. Round this number to theRound 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.
13. Round this number to theRound this number to the
nearestnearest
hundredhundred..
4 or less, just ignore.
3 0 0
Change the numbers to right
of 3 to 0’s.