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 TOPICS This page:   about math    Search   Dr. Math See also the Dr. Math FAQ:   why study math? MIDDLE SCHOOL About Math Algebra    equations    factoring expressions    graphing equations Arithmetic    division    exponents    factorials    factoring numbers    fractions/percents    logarithms Definitions Geometry    2-dimensional      conic sections/        circles      triangles/polygons    3D and higher      polyhedra History/Biography Logic Measurement    calendars/      dates/time    temperature    terms/units Number Sense    factoring numbers    negative numbers    pi    prime numbers    square roots Probability Puzzles Ratio/Proportion Statistics Word Problems Browse Middle School About Math Stars indicate particularly interesting answers or good places to begin browsing. Why Estimate? [09/16/2002] Why do we use estimation? Why Find the LCM? [10/07/1998] Where do you use LCMs? How do they apply to real life? Why is Math Interesting? [01/16/2001] Why does math have to be so boring and hard? Why Is Mental Math Important? [03/25/2004] How can I convince a 14 year old girl who is in 8th grade the importance of mental math? I think that skills like mentally adding and subtracting 2 digit numbers and being able to estimate multiplying 2 digit large numbers are critical. My daughter's teacher says that such skills aren't needed because of calculators and computers. Why is Pi Everywhere? [2/9/1996] Why does pi show up in things that don't seem to be related to circles? Why is the Word "Number" Abbreviated to "No."? [05/13/2002] Why is the word number abbreviated to no.? Why Learn to Factor? [07/08/2002] Why do I need to learn to factor expressions if I'm going to be a fashion designer? Why Math? [3/25/1996] Why do you like math so much? The Why of Algebra [11/13/1998] What is algebra for? Why do you need the letters and variables? Why Proofs? Definitions and Axioms [09/16/2001] Why are proofs important in the development of a mathematical system like geometry? Why Rules? [08/15/2001] Why do we need to have rules for order of operations? Why Use h and k for the Center of a Circle? [05/09/2000] Why are k and h used in the equation (x-h)^2 + (y-k)^2 = 0 for a circle with center (h,k)? Why not j and f, etc.? Why Use Letters in Math? [12/01/1999] Why do we need to use letters in math? Why Use X and Y for Variables? [10/23/2002] Why do we use x and y for variables in an equation? Why was Math Invented? [2/26/1996] Why was math invented? What about geometry? Writing Checks [07/31/2002] When writing a check, how do you indicate the number of cents in the part where you write out the amount using words? Years That Start on Sunday [10/02/2000] What is the probability that a randomly chosen year will start on a Sunday? Zero and One, Each Unique in Its Own Special Way [04/10/2013] Zero is neither positive nor negative; 1 is neither prime nor composite. So how do we classify these numbers? Zero Before the Decimal Point? [10/06/2000] What is the merit of writing the zero before the decimal point in numbers less than one, for example 0.25? Page: [

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