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Transcript of Dividing Decimals
Dividing Decimals One Way you can do this is by rounding each number to the greatest place that has a non-
Ex: 269.95 divided by 23 can be
rounded to 300 divided by 20
Another Way you can do this is
by using compatible numbers
you can divide in your head.
Ex: 269.95 divided by 23 can
be rounded to 275 divided by
25 = 11 7-3
Divided by Whole Numbers Write the decimal point in the quotient
directly above the decimal point
in the dividend.
Then you divide the decimal the same
way you would divide a whole number
Ex: 42.45 divided by 3 = 14.15 7-2
Dividing a Decimal
by a Whole Number The quotient of a number divided by 10,100,or 1,000 is less than the number.
Moving the decimal point
in a number to the
left decreases the numbers
Since place-value is based on 10, dividing by 10,100,or 1,000 gives the same result as moving the decimal point 1,2,or 3 places.
Ex: 12.5 divided by 10 = 1.25
12.5 divided by 100 = 0.125
12.5 divided by 1,000 = 0.0125 7-1
Dividing Decimals by
10,100,or 1,000 7-4
Dividing a Decimal
by a Decimal Multiply the divisor by a
power of 10 to make it a
whole number. Ex: 0.84 x 100 = 84
Multiply the dividend by
the same power of 10. Ex: 3.99 x 100 = 399
Place the decimal point in the quotient. Divide as you would with whole numbers. So, 3.99 divided by 0.84 = 4.75 Presentation
Ella Quick Quiz What is 16.4 divided by 10 1.64 16.4 divided by 10
16.4 move 1 place to the left because
it has 1 zero in the 10. So the answer is: The quotient should be LESS than the
dividend. 27.5 divided by 100
Move the decimal 2 places to the left. What is 27.5 divided by 100? 0.275