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You need to order and compare decimals because if you are going shopping and you need to compare prices and put the decimals in order  to see how much something costs. You compare decimals by taking two decimals like 13.40 and 13.4 so if you say 13.4 and 13.40 you sat it the same way  thirteen FOURTY iths and thirteen FOURTY iths so they are equal to each othert

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1) rounding decimals  is easy. All you need to do is to look beside the number you're rounding and if its 5 or higher then round up. If its 4 or lower you round down to the next wholeif your number was 7.69, you're rounding the 7. So look at the .6 is it higher or lower than 5? Its higher than 5 so round up . So 7.69 rounds up to 8.

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you add and subtract decimals becouse if you want to by a car or go grocery shopping you have to add and subtract decimals (money). This  is the steps to ADDING DECIMAls  * first put your decimal up    * Then make sure your digits are lined up correctly   * then add your decimals *make sure that your answer has a decimal in the right place.D
o the same thing with subtracting decimals.

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2) You convert decimals into fractions because you are teaching your brain new skills in math. so you have a decimal . say its.24 you say it 24 hundredths so as a fraction its going to be 24/100