Subtracting DecimalsDate: 09/16/97 at 08:59:29 From: Emileigh Merce Subject: Subtraction I can't figure out what 1100000 - 1100000 - 700000 - 123456789 - 14 = because I don't know how to do decimals. I've tried a calculator, but it's too long. Please help me! Date: 11/10/97 at 12:17:45 From: Doctor Sonya Subject: Re: Subtraction Dear Emileigh, Your question is hard for me to answer because you ask about decimals, but there aren't any decimals in the numbers you wrote down. I'll tell you how I subtract decimals, and maybe that will help some. The first thing to remember is that subtracting decimals is almost the same as subtracting whole numbers (numbers without decimals). If you are going to subtract one number from another, you set it up like this, right?: 427350 - 3447 ------ 423903 If you're going to subtract a decimal from another decimal, you set it up the same way, but you put the decimal points right above each other, like this: 10.67 -4.33 ----- ? Then you put the decimal point in the same place in the answer, and continue to subtract as if it's not there. Here's my example: First I put the decimal point in: 10.67 -4.33 ----- . Now I do the subtraction: 10.67 -4.33 ----- 6.34 If the two decimal parts of the numbers are not the same length, just fill in the shorter one with zeros. 45.89 -23.5774 -------- ? becomes 45.8900 -23.5774 -------- ? and then you do the subtraction the way we did above. 45.8900 -23.5774 -------- 22.3036 Here's one more example for you to do yourself: 20.567 -17.43386 --------- ? I hope this helps. Write us back if you ever have any more questions. -Doctor Sonya, The Math Forum Check out our web site! http://mathforum.org/dr.math/ |
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