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Decimals (Notation + Addition)- Jan 5th. 2020

 Decimal Notation

Examples:

a.     5.1= five and one-tenth

b.     10.98    ten and ninety-eight hundredths

c.     3. 156=  three and one hundred and fifty-six thousanths

d.     0.009= nine thousandths


Write in words: 

1.     7.92 _____________________________________

2.     34.18 ____________________________________

3.     0.002 ____________________________________

4.     8.019 ____________________________________

5.     4.1 ______________________________________





Addition of Decimals







When you are adding decimals, you must make sure the decimal points are perfectly lined up. 

Example:

6.81 + 4.7=            6. 81
                    +  4. 7 0

9.173 + 3.87 + 0.6

=             9. 173
               3. 870
       +      0. 600


Complete: 
Remember to line up your decimal points. 

1.     3.9 + 2.5 + 3.4

2.     6.57 + 31.8 + 5.39

3.     0.8 + 36.57 + 0.006

4.    28.75 + 6.738

5.    0.7 + 13.05 + 0.009

6.     6.17 + 15.7 + 28


Homework

Section A

 1) In the number 78.9, what digit (number) is in the tenths place? 

2) In the number 78.9, what digit is in the ones place? 

3) In the number 78.9, what digit is in the tens place? 

4) In the number 6174.903, what digit is in the thousands place? 

5) In the number 6174.903, what digit is in the thousandths place?

 6) In the number 6174.903, what digit is in the hundredths place? 

7) In the number 6174.903, what digit is in the tenths place? 


Section B

Write in digits

1. Twenty-nine hundredths

2. Eighty-one hundredths 

3. Nine thousand thirty-four and seven tenths 

4. One and four thousandths

 5. One hundred and sixty-two thousandths 

6. Forty-five hundredths 

7. Four thousand and three and twenty-one hundredths

 8. One hundred twenty and five-tenths

 9. Seventeen thousandths 

10. One and seven-tenths


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