It is not a matter of aligning the decimal points, but aligning the place value columns so that the ones are under each other, the tens are under each other, the tenths are under each other, etc which is the proper way to subtract. As the decimal points are between the ones and tenths columns, with those place value columns aligned, the decimal points are aligned.Aligning the decimal points is an easy way to remember to align the place value columns, as with the decimal points aligned all the place value columns are automatically aligned.
Nine and nine tenths in decimal form is 9.9
the decimal for nine seventeenths = 0.52949/17:= 9 ÷ 17= 0.5294 in decimal
nine decimal 4
9 and 9/10 as a decimal is 9.9
All you do is move the decimal of 0.09 two times to the left. You get the answer 0.0009 or nine ten thousandths.
It is not a matter of aligning the decimal points, but aligning the place value columns so that the ones are under each other, the tens are under each other, the tenths are under each other, etc which is the proper way to subtract. As the decimal points are between the ones and tenths columns, with those place value columns aligned, the decimal points are aligned.Aligning the decimal points is an easy way to remember to align the place value columns, as with the decimal points aligned all the place value columns are automatically aligned.
It doesn't matter where the 0 is in the number, its place value is always 0. However, to calculate the place value for any digit the decimal point tells you where to start the place value columns from. To the left of the decimal point starting with the column immediately to the left of the decimal point the columns have place values: 1, 10, 1000, ... multiplying by 10 for each column left you go. To the right of the decimal point, starting with the column immediately to the right of the decimal point, the columns have place values: 1/10, 1/100, 1/1000, ... dividing by 10 for each column right you go. So starting with the column immediately to the left of the decimal point and a value of 1, multiply the value by 10 if you move left a column, or divide the value by 10 if you move right a column, move through the columns until you reach the digit. once you have reached you digit, you have found the value of its column and multiplying the two together will tell you the digits value. Example: for the 5, starting to the left of the decimal point with 1, it is required to move right 3 columns, so divide by 10 three times to get the column value for the 5 of 1/1000 which, when multiplied by 5 gives its value as 5/1000 or five thousandths.
Nine and nine hundredths in decimal form is 9.09
Nine and nine tenths in decimal form is 9.9
That will depend on the nature of the numbers. If there are no decimal places, you could use a right tab. If there are decimal places, you could use a decimal tab. If the numbers will all have the exact same amount of digits, then you could use a left, decimal or right tab.
nine twelfths as a decimal = 0.759/12:= 9 ÷ 12= 0.75 in decimal
the decimal for nine seventeenths = 0.52949/17:= 9 ÷ 17= 0.5294 in decimal
nine decimal 4
9 and 9/10 as a decimal is 9.9
seven out of nine as a decimal = 0.7778 7/9: = 7 ÷ 9 = 0.7778 in decimal
decimal form of nine and five ninths = 9.5556