rounding
TRANSCRIPT
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Rounding NumbersRounding Numbers
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When do you use When do you use rounding?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.
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Memorize this PoemMemorize this Poem
Find your number.Look right next door.4 or less you just ignore.5 or up, add 1 more.Are we done yet?No, not quite.Add zeroes to the right.
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Round this number to the Round this number to the nearestnearest
ten thousand.ten thousand.
Find your number.3 6 8,9 7
1Circle the number in the ten thousands place.
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Round this number to the Round this number to the nearestnearest
ten thousand.ten thousand.
Look right next door.
3 6 8,9 7 1
Draw an arrow to the right of the number.
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Round this number to the Round this number to the nearestnearest
ten thousand.ten thousand.
4 or less, just ignore.
3 6 8,9 7 1
8 is larger than 4 so go to the nextline of the poem.
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Round this number to the Round this number to the nearestnearest
ten thousand.ten thousand.
5 or up, add 1 more.
3 6 8,9 7 1Add 1 to the 6.
+1
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Round this number to the Round this number to the nearestnearest
ten thousand.ten thousand.
Are we done yet? No, not quite. Add zeroes to the right.
3Add 1 to the 6.
6 8,9 7 170,000
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The AnswerThe Answer
368,971 rounded to the nearest ten thousand is
3 7 0,0 0 0
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Round this number to the Round this number to the nearestnearest
thousand.thousand.
Find your number.
3 5, 3 2 7Circle the number in the thousands
place.
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Round this number to the Round this number to the nearestnearest
thousand.thousand.
Look right next door.
3 5, 3 2 7Draw an arrow to the right of the
number.
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Round this number to the Round this number to the nearestnearest
thousand.thousand.
4 or less, just ignore.
3 5, 3 2 7
Since 3 is less than 4 we do not changethe 5.
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Round this number to the Round this number to the nearestnearest
thousand.thousand.
4 or less, just ignore.
3 5, 327
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Round this number to the Round this number to the nearestnearest
thousand.thousand.
4 or less, just ignore.
3 5, 0 0 0327
Are we done yet? No, not quite. Add zeroes to the right.
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The AnswerThe Answer
35,327 rounded to the nearest thousand is
3 5, 0 0 0
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Round this number to the Round this number to the nearestnearestdollar.dollar.
Find your number.
$ 5. 8 7
Circle the number where the dollarsare.
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Round this number to the Round this number to the nearestnearestdollar.dollar.
Look right next door.
$ 5. 8 7
Draw an arrow to the right of thecircled number.
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Round this number to the Round this number to the nearestnearestdollar.dollar.
4 or less, just ignore.
$ 5. 8 78 is greater than 4 so go to the next
line of the poem.
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Round this number to the Round this number to the nearestnearestdollar.dollar.
5 or up, add 1 more.
$ 5. 8 7Since 8 is greater than 5 add 1 to the
5.
+1
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Round this number to the Round this number to the nearestnearestdollar.dollar.
5 or more, add 1 more.
$ 6. 5 0 0
87
Are we done yet? No, not quite. Add zeroes to the right.
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The AnswerThe Answer
$5.87 rounded to the
nearest dollar is
$ 6. 0 0
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Round this number to the Round this number to the nearestnearest
tenth place.tenth place.
Find your number.
4. 8 7 1Circle the number in the tenths place.
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Round this number to the Round this number to the nearestnearest
tenth place.tenth place.
Look right next door.
4. 8 7 1Draw an arrow to the right of the
circled number.
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Round this number to the Round this number to the nearestnearest
tenth place.tenth place.
4 or less just ignore.
4. 8 7 17 is greater than 4 so go to the next
line of the poem.
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Round this number to the Round this number to the nearestnearest
tenth place.tenth place.
5 or up, add 1 more.
4. 8 7 1Since 7 is greater than 5, add 1 to the
8.
+1
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Round this number to the Round this number to the nearestnearest
tenth place.tenth place.
5 or up, add 1 more.
4. Are we done yet? No, not quite.
Add zeroes to the right.
987100
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The AnswerThe Answer
4.871 rounded to the nearest tenth place is
4. 900
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Round this number to the Round this number to the nearestnearest
whole number.whole number.
Find your number.
4. 8 7 1Circle the number in the ones place.
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Round this number to the Round this number to the nearestnearest
tenth place.tenth place.
Look right next door.
4. 8 7 1Draw an arrow to the right of the
circled number.
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Round this number to the Round this number to the nearestnearest
tenth place.tenth place.
4 or less just ignore.
4. 8 7 18 is greater than 4 so go to the next
line of the poem.
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Round this number to the Round this number to the nearestnearest
tenth place.tenth place.
5 or up, add 1 more.
4. 8 7 1Since 8 is greater than 5, add 1 to the
4.
+1
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Round this number to the Round this number to the nearestnearest
tenth place.tenth place.
5 or up, add 1 more.
4. Are we done yet? No, not quite.
Add zeroes to the right.
5.871000
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The AnswerThe Answer
4.871 rounded to the nearest whole number
5. 000