Adding 1000 and 100Date: 11/23/97 at 21:40:13 From: Julia Collins Subject: Addition I am really wondering how to add 1000 + 100. I have tried to add them together like this: 1000 +100 ----------- ? Can you help me? Date: 11/24/97 at 13:19:00 From: Doctor Mike Subject: Re: Addition Dear Julia, You line them up vertically so the far right digit of the bottom number is lined up with the far right digit of the top number. It will look like this : 1000 + 100 ------- 1100 You read this answer either as "one thousand, one hundred" or as "eleven hundred." Here is another example : 1024 + 210 ------- 1234 What I have done here is to add together the two digits in each vertical pair of numbers. Each position in a number is often called a "PLACE." For instance, the position that has a 2 in the top number, a 1 in the bottom number, and a 3 in the answer is called the "tens place," because whatever is there means a certain number of tens. When I add 2 and 1 to get 3, what this means is that I am adding 2 tens and 1 ten to get 3 tens. That is the same as adding 20 and 10 to get 30. You will learn much more about number places as you continue in school. I will end by telling you about all the places in the answer number 1234. In the number 1234, ... The "1" is in the "thousands" place, and it means 1000 The "2" is in the "hundreds" place, and it means 200 The "3" is in the "tens" place, and it means 30 The "4" is in the "ones" place, and it means 4 Add all those together, ... ------ ... and you get 1234 I hope this helps. Write back to us if you have another question. -Doctor Mike, The Math Forum Check out our web site! http://mathforum.org/dr.math/ |
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