Transcript Round to tenths

Steps for Rounding Decimals
1. Draw a line after the digit on the place to which
you are rounding.
3.543 rounded to the nearest tenth
3. 5 4 3
2. Draw an arrow to the digit on the right.
3. 5 4 3
3. If the digit after the line is 0, 1, 2, 3, or 4, then
the digit before the line remains the same.
4. Drop all the digits after the line.
3. 5 4 3
5. If the digit after the line is 5, 6, 7, 8, or 9, then
the first digit goes up.
Round 3.573 to the nearest tenth.
3. 5 7 3
3. 6 7 3
Remember to drop all digits after the line!!
REMEMBER:
5 or more, add one more
4 or less, let it rest!
The Rounding Poem
Find your number
Look right next door
4 or less, just ignore
5 or more, add one more!
Round 4.167 to the closest hundredths
4.167
4.17
Find your number
Look right next door
4 or less, just ignore
5 or more, add one more!
You’re
on
FIRE!!!!! 
Special Case!
Rounding a 9
Round 2.197 to the hundredths place
Since there is a “9” in the hundredths place
and the digit to the right is a “7”, consider the
tenth and hundredths together – 19 – do you
leave it at 19 or move it to 20?
2.197 rounded to the hundredths
place is 2.20
Round 4.95 to the tenths place
Since there is a “9” in the tenth
spot and a “5” to the right,
consider the ones and tenths
together…… should you leave it at
49 or move it to 50?
4.95 rounded to the nearest
tenth is 5.0
Remember
If you are asked to round to the
nearest tenth…….your answer
stops at the tenth place!
Example: Rounding 42.73 to the
tenths place would be 42.7
Let’s try these numbers
Round to the underlined place-value
position.
1)
2)
3)
4)
5)
6)
18
18.44 ≈ __________
0.85
0.849 ≈ __________
20.4
20.42 ≈ __________
19.78
19.775 ≈ _________
3.5
3.471 ≈ __________
99.98 ≈ __________
100.0
Try these
Round to tenths:
Round to hundredths:
4.6
18.784
18.78
5.32
5.3
9.456
9.46
0.98
1.0
9.997
10.00
4.56
Round the numbers on each flower to
the nearest….
3) hundredths
2) tenths
1) ones
1.928
0.39
0.205
2
0.4
0.21
4) tenths
5) ones
0.056
6) hundredths
1.395
0.1
1
7) ones
2.594
3
0.933
8) tenths
2.222
2.2
0.93