reading, writing and comparing decimals
DESCRIPTION
Reading, Writing and Comparing Decimals. Decimals are a way to show parts of a whole. Examples:. 0.8. 0.5. 0.125. 0.65. Place Value Puzzle. Thousandths. Hundreds. Hundred Thousands. Ten Thousandths. Tens. Hundredths. Ten Thousands. Millions. Thousands. Tenths. Ones. - PowerPoint PPT PresentationTRANSCRIPT
Reading, Writing and Comparing Decimals
Decimals are a way to show parts of a whole.
Examples:
0.5 0.650.8 0.125
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Place Value Puzzle
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Moving Around with Place Values
Let's look at the place value chart.
Name the underlined place value.1.) 8.457 2.) 2.97
3.) 0.0312 4.) 3.09
Read the number before the decimal point.
Say “and” when you get to the decimal.
Read the number after the decimal.
Say the name of the place that the decimal ends in.
Reading Decimals
How do we write or say decimals numbers?
Write the following in word form.
1.) 2.93 ________________________________________________
2.) 0.839 _______________________________________________
3.) 5.7002 ______________________________________________
_______________________________________________________
4.) 34.800367____________________________________________
_______________________________________________________
Write each number in standard form.
1.) forty-five hundredths __________________
2.) three and two hundred eighty-four thousandths ________
3.) twenty-eight ten-thousandths _________________
4.) four and eighteen thousandths ________________
5.) seventeen and thirty thousand five hundred eight millionths ________________
Equivalent Decimals: Name the same amount.
1.4 = 1.40 = 1.400
Compare and Order Decimal Numbers
Review:
- Name an equivalent decimal for 0.20 _______________
- Name an equivalent decimal for 0.060 _____________
Which decimal is smaller? Use < or >.
0.75 0.9
Remember the mouth opens to the larger number
method 1:
Method 1: Using a grid
Which decimal is smaller? Use < or >.
Method 2: Using a number line.
1.9 1.35
0 1 2
1.) You must compare decimals with the same number of place values.
2.) Rewrite the numbers vertically lining up the decimal points.
3.) Add zeros to fill in missing place values.
4.) Compare each place value, starting with the place value to the left.
Method 3: Compare each place value
Which decimal is smaller? Use < or >.
3.09 3.145
Demonstrate understanding
Compare using <,>, or =.
1. 10.089 ______ 10.890 2. 2.4 ________ 2.08
3. 658.848 _______658.484 4. 34.50 ________34.5
5.) 81.98 ________81.098 6.) 5.008 _______5.08
Write the numbers in order form least to greatest. It is helpful to write the numbers vertically.
1.) 4.09 4.9 4.909 4.89
LEAST _____, ______, _____, _____ Greatest
2.) 2.78 3 3.78 2.078 3.078
Least ____, ____, ____, ____, ____ Greatest
3.) 5.6 5.66 5.606 5.06 5.006
LEAST ____, ____, ____, ____, ____ Greatest
Circle the greatest decimal.
1.) 3.09 3.90 3.009
2.) 0.23 2.03 0.32
3.) 8.012 8.12 8.2
Circle the smallest decimal
4.) 7.4 7.04 7.44 7.404
5.) 3.14 3.04 3.41 3.4
6.) 11 10.4 10.05 10.006