Transcript Rounding Off Decimals

Rounding Off Decimals
January 8,2016
Rounding Off Decimals
Round off 3.7 to the nearest whole number
3
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
Where
the nearest
whole
3.7 isare
nearer
to 4 than
to 3numbers?
3.7 is ?4 when rounded off to the
nearest whole number
4
Rounding Off Decimals
Round off 5.764 to the nearest whole number
5
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.764
Where
nearest
5.764are
is the
nearer
to 6whole
than numbers?
to 5
5.764 is ?6when rounded off to the
nearest whole number
6
Rounding Off DecimalsWhat is the first
hundredth?
This is a
hundredth.
So it is between
two tenths.
Round off 7.62 to the nearest tenth
7.6
7.61 7.62
7.63
7.64
7.65 7.66
7.67 7.68
7.69 7.7
Between two tenths there are 10 hundredths
What are the nearest two tenths?
7.62 is nearer to 7.6 than to 7.7
7.62 is 7.6
? when rounded off to the
nearest tenth
Rounding Off Decimals
This is a
hundredth.
Round off 4.55 to the nearest tenth
4.5
4.51 4.52
4.53
4.54
4.55 4.56
4.57 4.58
4.59 4.6
Rounding off to the nearest tenth is the same
asWhere
roundingare
off to
1 decimal
the
nearestplace.
tenths?
4.55 is halfway between 4.5 and 4.6
4.55 is ?4.6when rounded off to the
nearest tenth
Rounding Off Decimals
4.56  4.6
4.72  4.7
4.85  4.9
If the digit is equal to 5 or
more than 5, add 1 to the
digit in the tenths place.
If the digit is less than 5,
retain the digit in the tenths
place.
When rounding off to 1 decimal place, consider the
digit in the hundredths place only.
Rounding Off DecimalsWhat is the first This is a
thousandth.
thousandth?
So it is between two
hundredths.
Round off 4.518 to the nearest hundredth
4.51 4.511 4.512 4.513 4.514 4.515 4.516 4.517 4.518 4.519 4.52
Between two hundredths there are 10 thousandths
What are the nearest two hundredths?
4.518 is nearer to 4.52 than to 4.51
4.518 is 4.52
? when rounded off to
the nearest hundredth
Rounding Off DecimalsWhat is the first This is a
thousandth.
thousandth?
So it is between two
hundredths.
Round off 8.364 to the nearest hundredth
8.36 8.361 8.362 8.363 8.364 8.365 8.366 8.367 8.368 8.369 8.37
Between two hundredths there are 10 thousandths
What are the nearest two hundredths?
8.364 is nearer to 8.36 than to 8.37
8.364 is 8.36
? when rounded off to
the nearest hundredth
Rounding Off Decimals
This is a
thousandth.
Round off 4.515 to the nearest hundredth
4.51 4.511 4.512 4.513 4.514 4.515 4.516 4.517 4.518 4.519 4.52
Rounding off to the nearest hundredth is the
Where
are the off
nearest
hundredths?
same as rounding
to 2 decimal
places.
4.515 is halfway between 4.51 and 4.52
4.515 is 4.52
? when rounded off to
the nearest hundredth
Rounding Off Decimals
4.528  4.53
4.564  4.56
4.515  4.52
If the digit is equal to 5 or
more than 5, add 1 to the
digit in the hundredths
place.
If the digit is less than 5,
retain the digit in the
hundredths place.
When rounding to 2 decimal places, consider the
digit in the thousandths place only.
Rounding Off
Number
7.452
8.048
9.974
15.265
Whole
Number
Tenths
Hundredths
Rounding Off
Number
Tenths
Hundredths
7.452
Whole
Number
7
7.5
7.45
8.048
8
8.0
8.05
9.974
10
10
9.97
15.265
15
15.3
15.27
Rounding Off
Number
2.029
5.783
12.705
25.957
Whole
number
1 decimal
place
2 decimal
places
Rounding Off
Number
Whole
number
1 decimal
place
2 decimal
places
2.029
2
2.0
2.03
5.783
6
5.8
5.78
12.705
13
12.7
12.71
25.957
26
26
25.96