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Giải Toán Trên Mạng
Friday, May 21, 2010
How to make Long Division with Remainders?
When we are given a long division to do it will not always work out to a whole number.
Sometimes there will be numbers left over. These are known as
remainders
.
e.g: 435 ÷ 25
4 ÷ 25 = 0 remainder 4
The first number of the dividend is divided by the divisor.
The whole number result is placed at the top. Any remainders are ignored at this point.
25 × 0 = 0
The answer from the first operation is multiplied by the divisor. The result is placed under the number divided into.
4 – 0 = 4
Now we
take away
the bottom number from the top number.
Bring down the next number of the dividend.
43 ÷ 25 = 1 remainder 18
Divide this number by the divisor.
The whole number result is placed at the top. Any remainders are ignored at this point.
25 × 1 = 25
The answer from the above operation is multiplied by the divisor. The result is placed under the last number divided into.
43 – 25 = 18
Now we
take away
the bottom number from the top number.
Bring down the next number of the dividend.
185 ÷ 25 = 7 remainder 10
Divide this number by the divisor.
The whole number result is placed at the top. Any remainders are ignored at this point.
25 × 7 = 175
The answer from the above operation is multiplied by the divisor. The result is placed under the number divided into.
185 – 175 = 10
Now we
take away
the bottom number from the top number.
There is still 10 left over
but no more numbers to bring down.
With a long division with remainders the answer is expressed as
17 remainder 10
as shown in the diagram
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