1. Decimals (Concepts & Computation)
Nov. 30

2. Number Sense Whole number; number of people attending an event (305)
Decimal; number of gallons of gasoline (3.65)
Ratio; number of men compared to number of women (2:5)
Fraction; measurement of diameter (¾)
Percent; discount rate, interest rate (14.5%)

3. Decimals and Place Value
A decimal is a number with a decimal point in it (6.52, 0.5, 0.01)
The value of digits in a decimal is based on the number 10
The digits to the left of the decimal point represent whole number
The numbers to the right of the decimal point represent some part of 1

4. Exercise In what place is the underlined digit?
What number does the underlined name?
Circle the number in which the 3 has the greater value. , ,

5. Thousandths 2 1 6 4. 5 7 8 2; thousands 1; hundreds 6; tens 4; ones
2; thousands
1; hundreds
6; tens
4; ones
5; tenths
7; hundredths
8; thousandths

6. Exercise Write the decimals. ------ 4 ----- 86 ----- --- 2 -----
Fifty-two thousandths
Four and four thousandths
Eight thousandths
One hundred fifty-nine and twelve hundredths

7. Comparing and Ordering Decimals
Compare the decimals 0.27 and 0.25
Compare number of ones (0 = 0)
Compare number of tenths (2 = 2)
Compare number of hundredths (7 > 5)

8. Exercise Write <, =, or >.
Write in order from the least to the greatest
4.4 ; 4.7 ; 4.38
0.63 ; 0.6 ; 0.3
5.01 ; 4.98 ; 5
; ;

9. Changing Fraction to Decimal
You can change a fraction to a decimal by dividing the numerator by the denominator
Numerator; the top part of a fraction
Denominator; the bottom part of a fraction
When you divide until the remainder is zero, the decimal is a terminating decimal

10. Exercise Change each fraction to a decimal.
Write each decimal as a mixed number or fraction in simplest form