Transcript DECIMAL BASICS

DECIMAL BASICS
Representing, Comparing,
Ordering, and Rounding Decimals
1000
1
0.1
ten-thousandths
thousandths
hundredths
tenths
100 10
ones
tens
hundreds
thousands
Representing Decimals
0.01 0.001 0.0001
Write each number in word form.
a. 23.108
Twenty-three and one hundred eight thousandths
and
represents
the decimal number
behind the
decimal
last digit’s
place
value
Write each number in word form.
b. 1024.06
One thousand twenty-four and six hundredths
Standard Form
Standard form is the usual way to
write a number.
Write each number in standard form.
a. Seventy-six and one hundred three
thousandths
76.103
b. Fifty-nine and sixty-two thousandths
59.062
c. Eight thousandths
0.008
d. Three and four hundredths
3.04
COMPARING AND ORDERING
DECIMALS
the decimal points
1. Line up the numbers by _________________.
left and find the first place
2. Starting at the ______
different
the digits are __________.
3. Compare the different digits.
Use <, >, or = to compare the
following numbers.
1. 0.594 _____
> 0.562
Use <, >, or = to compare the
following numbers.
<
2. 29.64 _____ 29.84
=
3. 1.202 _____ 1.2020
Ordering Numbers from Least to
Greatest
 Order 25, 25.1, 24.36, 25.03 from least to
greatest.
Line up the numbers!
25
25.1
24.36
25.03
Ordering Numbers from Greatest to
Least
Order 71, 71.04, 70.89, and 71.4 from
greatest to least
71.4, 71.04, 71, 70.89
ROUNDING DECIMALS
Underline the digit to be rounded.
1. ____________
to the right
2. Look at the digit
__________________
a. _____
5 or greater – round up one
4 or less – stays the same
b. _____
same and all
3. Keep all the digits in front the _______
zero
those behind dropped or turn to _______.
Round Each Decimal
1) 7.601; ones
7.601
8
Round Each Decimal
2) 68.94; tenths
68.9
3) $13.75; nearest dollar
$14
4) $2.1493; nearest cent
$2.15
5) 1919.9199; thousandths
1919.920