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Unformatted text preview: Math Flash
Math Flash
Rounding
By Monica Yuskaitis Use rounding
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
Memorize 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 nearest
Round this number to the nearest
ten thousand. Find your number. 3 6 8,9 7 1
Circle the number in the ten
thousands place. Round this number to the nearest
Round this number to the nearest
ten thousand. Look right next door. 3 6 8,9 7 1
Draw an arrow to the right of the
number. Round this number to the nearest
Round this number to the nearest
ten thousand. 4 or less, just ignore. 3 6 8,9 7 1
8 is larger than 4 so go to the next
line of the poem. Round this number to the nearest
Round this number to the nearest
ten thousand. 5 or more, add 1 more.
+1 3 6 8,9 7 1
Add 1 to the 6. Round this number to the nearest
Round this number to the nearest
ten thousand. 5 or more, add 1 more. 3 7 0,0 0 0
Add 1 to the 6 and all the numbers
to the right of the 7 become 0’s. The Answer
The Answer 368,971 rounded to the nearest ten thousand is 3 7 0,0 0 0 Round this number to the nearest
Round this number to the nearest
thousand. Find your number. 3 5, 3 2 7
Circle the number in the thousands
place. Round this number to the nearest
Round this number to the nearest
thousand. Look right next door. 3 5, 3 2 7
Draw an arrow to the right of the
number. Round this number to the nearest
Round this number to the nearest
thousand. 4 or less, just ignore. 3 5, 3 2 7
Since 3 is less than 4 we do not change
the 5. Round this number to the nearest
Round this number to the nearest
thousand. 4 or less, just ignore. 3 5, 0 0 0
Change the numbers to left of 5 to 0’s. The Answer
The Answer 35,327 rounded to the nearest thousand is 3 5, 0 0 0 Round this number to the nearest
Round this number to the nearest
dollar. Find your number. $ 5. 8 7
Circle the number where the dollars
are. Round this number to the nearest
Round this number to the nearest
dollar. Look right next door. $ 5. 8 7
Draw an arrow to the right of the
circled number. Round this number to the nearest
Round this number to the nearest
dollar. 4 or less, just ignore. $ 5. 8 7
8 is greater than 4 so go to the next
line of the poem. Round this number to the nearest
Round this number to the nearest
dollar. 5 or more, add 1 more.
+1 $ 5. 8 7
Since 8 is greater than 5 add 1 to the
5. Round this number to the nearest
Round this number to the nearest
dollar. 5 or more, add 1 more. $ 6. 0 0
Change the 5 to a 6 and change all the
numbers to the right to 0’s. The Answer
The Answer $5.87 rounded to the
nearest dollar is $ 6. 0 0 Round this number to the nearest
Round this number to the nearest
tenth place. Find your number. 4. 8 7 1
Circle the number in the tenths place. Round this number to the nearest
Round this number to the nearest
tenth place. Look right next door. 4. 8 7 1
Draw an arrow to the right of the
circled number. Round this number to the nearest
Round this number to the nearest
tenth place. 4 or less just ignore. 4. 8 7 1
8 is greater than 4 so go to the next
line of the poem. Round this number to the nearest
Round this number to the nearest
tenth place. 5 or more, add 1 more.
+1 4. 8 7 1
Since 7 is greater than 5, add 1 to the
8. Round this number to the nearest
Round this number to the nearest
tenth place. 5 or more, add 1 more. 4. 9
Change the 8 to a 9 and drop the
numbers to the right of the 9. The Answer
The Answer 4.871 rounded to the nearest tenth place is 4. 9 ...
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This note was uploaded on 11/22/2011 for the course EL ED 361 taught by Professor Brotherraymond during the Fall '11 term at BYU.
 Fall '11
 BrotherRaymond

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