What is Expanded Notation?Date: 08/22/2001 at 18:20:15 From: Guy Sularz Subject: Math My daughter was asked to rewrite each number as expanded notation. What is expanded notation? Thank you. Date: 08/23/2001 at 08:26:25 From: Doctor Sarah Subject: Re: Math Hi Guy - thanks for writing to Dr. Math. Here's an explanation of expanded notation by Mary Lou, from our Teacher2Teacher service: http://mathforum.org/t2t/thread.taco?thread=278 The Hindu Arabic system that is used to write numbers assigns a place value to a position in a number. The number 5487.32 consists of the digits: 2, 3, 4, 5, 7, and 8. However, each of these digits occupies a different position in the number. The 2 represents 2/100ths. The 3 represents 3/10ths. The 7 represents 7 units or 7. The 8 represents 8 tens or 80. The 4 represents 4 hundreds or 400, whereas the 5 represents 5 thousands or 5,000. To write the number 5487.32 in expanded notation you would write: 5000 + 400 + 80 + 7 + 3/10 + 2/100. Try some. Remember that if there is a zero in the number, such as in 5039, the zero says that there are zero hundreds or no hundreds. The expanded notation for 5039 is 5000 + 30 + 9. You might also want to look at an answer about expanded form and standard form from our Dr. Math archives: Expanded and Standard Forms http://mathforum.org/library/drmath/view/57137.html - Doctor Sarah, The Math Forum http://mathforum.org/dr.math/ |
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