Multiplying by 1000Date: 03/10/97 at 18:40:15 From: Peggy Suter Subject: Math What is two thousand five hundred forty two x one thousand and how did you do it? Date: 03/11/97 at 11:10:51 From: Doctor Mike Subject: Re: Math Dear Peggy, Any time you multiply a number by 10 it moves the decimal point one place to the right. Similarly, any time you divide a number by 10 it moves the decimal point one place to the left. Speaking of decimal points, a whole number has a decimal point, even though it is sometimes not written. For your number, "2542" is the same as "2542." which is the same as "2542.0000" , etc. Okay, why am I talking to you about 10 when you asked about 1000? The reason is that 1000 is "ten times ten times ten" or 10 cubed, so multiplying by 1000 is exactly the same as multiplying by 10 three times. With me so far? Let's look at your problem : 2542 x 1000 = 2542.0000 x 10 x 10 x 10 = 2542000.0 So the answer is 2542000 , which is about 2 and a half million. Sometimes larger numbers like this are written using commas like 2,542,000 but this is not necessary. -Doctor Mike, The Math Forum Check out our web site! http://mathforum.org/dr.math/ |
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