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DIVISION
In this lesson
you will learn how to divide a decimal number by a whole number.
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Let's first
review some terms used in division. |
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Basically, you follow the same
rules for dividing decimals by a whole number, as you would for dividing
a whole number by a whole number. Remember the five steps for
dividing?
When you have a decimal in the
dividend:
- at first, just ignore the
decimal point and divide as usual
- then if you "run out of
digits" in the dividend, just annex zeros until it comes out even, or
can be rounded to the hundredths place.
- then bring the decimal point
straight up in to the quotient.
Here's your first example:
| At first, just
ignore it and divide as usual. |
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| Then if you "run
out of digits" in the dividend, just annex zeros until it comes out
even, or to the hundredths place. |
(You didn't run
out of digits in this problem; it came out evenly.) |
| Then bring the
decimal point straight up into the quotient. |
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| Then check your
answer by multiplying. (Remember the rules for multiplying
decimals!) |
12.7
x 8
101.6
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Now here is a more difficult
problem, where you do need to annex zeroes.
| At first, just
ignore the decimal point and divide as usual.
But it doesn't come out even; you have a
remainder of 7. |
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| Then if you "run
out of digits" in the dividend, just annex zeros until it comes out
even. In this case, you only have to
annex one zero for it to come out even. |
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| Then bring the
decimal point straight up into the quotient. |
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Then check your
answer by multiplying. (Remember the rules for multiplying
decimals!) Your product is equal to the
dividend, so it checks!
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Ready
for practice?
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