Long addition - Revision history

WesleyS: link

2008-11-25T02:43:49Z

link

2008-11-16T23:37:39Z

2008-11-11T23:38:55Z

howzis?

2008-11-11T21:34:09Z

method can be used for any amount of numbers

2008-11-04T22:28:44Z

2008-11-04T22:16:59Z

placeholder for picture of it

New page

[[Image:Picture8ol0.png]]

← Older revision		Revision as of 02:43, November 25, 2008
Line 1:		Line 1:
−	'''Long addition''' is a simple, fairly long winded, but highly useful method of adding multi-digit ~~numbers~~ together.	+	'''Long addition''' is a simple, fairly long winded, but highly useful method of adding multi-digit [[number]]s together.

	Imagine that we are adding 205 to 876.		Imagine that we are adding 205 to 876.

← Older revision		Revision as of 23:37, November 16, 2008
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−	Long addition is a simple, fairly long winded, but highly useful method of adding multi-digit numbers together.	+	'''Long addition''' is a simple, fairly long winded, but highly useful method of adding multi-digit numbers together.

	Imagine that we are adding 205 to 876.		Imagine that we are adding 205 to 876.

@@ Line 3: / Line 3: @@
 Imagine that we are adding 205 to 876.
-*Firstly, write the numbers above each other - make sure that you write units first, then tens, then hundreds, and so on. Writing from right to left helps here.
+*Firstly, write the numbers above each other. Make sure that the digits of both numbers are clearly aligned according to their place values (i.e. ''hundreds, tens and units''). Leaving a definite space between your columns helps avoid confusion, especially with larger sums.
 <center>
 [[Image:Picture8ol0.png]]
 </center>
 [[Category:Mathematics]]

@@ Line 3: / Line 3: @@
 Imagine that we are adding 205 to 876.
-*Firstly, write the two numbers above each other - make sure that you write units first, then tens, then hundreds, and so on. Writing from right to left helps here.
+*Firstly, write the numbers above each other - make sure that you write units first, then tens, then hundreds, and so on. Writing from right to left helps here.
 *Then, it is as simple as adding the columns, again, from right to left. If you get a number that it ten or greater - in our example, adding 5 and 6 gives 11 - then right the first digit under the column one 'space' to the left. This then becomes part of the column of numbers that you add. If there is nothing in a column, treat it as 0 - when adding the 8 and 2 in the hundreds column, for example, we get a 1 that is then carried over into the empty thousands column. It is the only entry there, so we drop it down to the answer box.

← Older revision		Revision as of 22:28, November 4, 2008
Line 1:		Line 1:
		+	Long addition is a simple, fairly long winded, but highly useful method of adding multi-digit numbers together.
		+
		+	Imagine that we are adding 205 to 876.
		+
		+	*Firstly, write the two numbers above each other - make sure that you write units first, then tens, then hundreds, and so on. Writing from right to left helps here.
		+
		+	*Then, it is as simple as adding the columns, again, from right to left. If you get a number that it ten or greater - in our example, adding 5 and 6 gives 11 - then right the first digit under the column one 'space' to the left. This then becomes part of the column of numbers that you add. If there is nothing in a column, treat it as 0 - when adding the 8 and 2 in the hundreds column, for example, we get a 1 that is then carried over into the empty thousands column. It is the only entry there, so we drop it down to the answer box.
		+	<center>
	[[Image:Picture8ol0.png]]		[[Image:Picture8ol0.png]]
		+	</center>
		+
		+	[[Category:Mathematics]]