Finding Decimals on a Number LineDate: 01/16/2002 at 18:34:12 From: Hubert Subject: Finding decimals on a number line How can I find a number like 0.725 on a number line? Date: 01/16/2002 at 22:38:27 From: Doctor Peterson Subject: Re: Finding decimals on a number line Hi, Hubert. One way is to do it one digit at a time. First find 0; your number is between 0 and 1. Now divide that interval into 10 equal parts; 0.7 is 7 tenths past 0: | +---+---+---+---+---+---+---+---+---+---+ 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Now your number is between 0.7 and 0.8. Divide that interval into ten equal parts, and 0.72 is 2 hundredths past 0.7: | +---+---+---+---+---+---+---+---+---+---+ .7 .71 .72 .73 .74 .75 .76 .77 .78 .79 .80 Do you see the last step? You can also recognise that .25 is 1/4, so 0.725 is 1/4 of the way from 0.7 to 0.8; but if you don't see that, don't worry about it. - Doctor Peterson, The Math Forum http://mathforum.org/dr.math/ |
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