Decimals (1)

1. PLACE VALUE WITH
DECIMALS
Chapter 1.2

2. How do I know what kind of decimal it is?
 The name of a decimal is determined by the number
of places to the right of the decimal point
Number of Places Decimal Name Example
1 tenths 0.7
2 hundredths 0.05
3 thousandths 0.016

3. What are mixed decimals?
 Mixed decimals are numbers with both whole
numbers and decimals
 The name of a whole number is determined by the
number of places to the left of the decimal point
 In the number 128.765, 1 is in the hundreds place, 2 is in the
tens place, 8 is in the ones place, 7 is in the tenths place, 6 is
in the hundredths place, and 5 is in the thousandths place

4. How do you read decimals?
 To read a decimal correctly, first find the decimal
point
 Whole numbers are to the left of the decimal point;
any numbers to the right of a decimal point form a
decimal fraction
 Say “and” for the decimal point
 The decimal 2164.511 is read as “two thousand, one hundred
sixty-four and five hundred eleven thousandths”

5. Zeros after the decimal point
 Writing extra zeros after the decimal point does not
change the value!
 The decimals 0.2, 0.20, and 0.200 are equivalent decimals

6. HERE ARE SOME PRACTICE PROBLEMS IN WHICH
I WILL WORK THROUGH WITH YOU TO MAKE
SURE THAT YOU UNDERSTAND THE MAIN
CONCEPTS COVERED.
Practice

7. Exercise 1
Write the decimals.
1.Five thousandths
2.Ninety-four thousandths
3.Three hundred thirty-six and sixty-nine hundredths

8. Exercise 2
Write each decimal in words.
1.7884.011
2.5592.4
3.4.203
4.612.250
5.10.44

9. Exercise 3
In what place (on the place value chart) is the
underlined digit? Write the answer.
1.1.475
2.3.763
3.7780.215
4.412.407
5.902.103

10. Exercise 4
Write a decimal that has the same number.
1.0.2
2.5.51
3.410.6
4.753.809

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