Rounding Fun!

advertisement
Rounding Fun!
I can round decimals to the nearest
given place value
Let’s Round!
Place Value
Think in your mind how you
remember the rules for rounding...on
your slate, write down a trick to share
with the class (be creative)
I like tricks!
Place Value Review
On your slate, label the place value of
each digit
5,678.9134
Thousands
Tens
Hundreds
Tenths
Ten-Thousandths
Thousandths
Hundredths
Ones
2. The tenths place neighbor will tell the
tenths
place whattotothe
do. nearest
Locate thetenth
Rounding
neighbor- the hundredths place
3. The trick is: If the NEIGHBOR is five or
more, add one more (to the place value you
are rounding to) or if the NEIGHBOR is 4 or
less just ignore (the place value you are
rounding to)
4. The neighbor (hundredths place) is a
seven, so what will happen to the tenths
place?
Round these numbers to the nearest
tenth
Try It On Your Own!
1. 675.321
2. 7,436.688
3. 12.563
4. 5.895
2. The hundredths place neighbor will tell
the Rounding
hundredthstoplace
what to do. Locate the
the nearest
neighbor- the
thousandths place
hundredth
3. The trick is: If the NEIGHBOR is five or
more, add one more (to the place value you
are rounding to) or if the NEIGHBOR is 4 or
less just ignore (the place value you are
rounding to)
4. The neighbor (thousandths place) is a
two, so what will happen to the hundredths
place?
Round these numbers to the nearest
hundredeth
Try It On Your Own!
1. 87.211
2. 5,432.999
3. 7.321
4. 16.902
Round to the nearest thousandths
place
Use the same rules! Find the place value you are
rounding to and look to it’s neighbor to tell you
what to do!
- 5 or more, add one more
Neighbor
- 4 or less, just ignore
65.9876
thousandths place
Try It On Your Own!
Round these numbers to the nearest
thousandth
1. 44.4388
2. 2.8943
3. 12.5655
4. 987.3329
to the $86.79
nearest
ForRounding
example: Round
to whole
the nearest
whole.
1. Look at the decimal number (seventy nine
hundredths)
2. Apply the same rule (5 or more, add one
more. 4 or less, just ignore)
3. Since the seven in 79 is greater than five,
the next place value (the ones-which is a
whole number) will round up
4. $86.79 rounded to the nearest whole
would be $87
Rounding to the nearest whole
Let’s try another one!
1. Look at the decimal number in the number.
2. Determine which place value would be the whole number
3. Apply the same rule (5 or more, add one more. 4 or less, just ignore)
• Round 6.8 pounds to the nearest whole
• Round 894.3 to the nearest whole
• 1,403.293 to the nearest whole
Closure
•On your slate, write the rules for
rounding we learned and another trick
that will help you remember how to
round
Follow-Up
1.
What is 3.9724 rounded to the nearest hundredth?
2.
What is 5.3184 rounded to the nearest whole number?
3.
What is 5.044 rounded to the nearest tenth?
4.
What is 6.68 rounded to the nearest whole number?
5.
What is 2.7669 rounded to the nearest thousandth?
6.
What is 4.292 rounded to the nearest whole number?
7.
What is 2.83 rounded to the nearest tenth?
You can
do it!
Download
Related flashcards

Elementary mathematics

20 cards

History of mathematics

17 cards

Mathematical analysis

32 cards

Functional analysis

24 cards

Number theory

27 cards

Create Flashcards