Divide by 8 and 9 Videos - Free Educational Videos for Students in K - 12

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Learn Simplifying Fractions & Equivalent Fractions - [5-4-13]

By Math and Science

Quality Math And Science Videos that feature step-by-step example problems!

      Complex Numbers In Polar Form De Moivre's Theorem, Products, Quotients, Powers, and nth Roots Prec

      By The Organic Chemistry Tutor

      This precalculus video tutorial focuses on complex numbers in polar form and de moivre's theorem. It explains how to find the products, quotients, powers and nth roots of complex numbers in polar form as well as converting it to and from rectangular form. This video contains plenty of examples and practice problems and is useful for high school and college students taking precalculus or trigonometry. Here is a list of topics: 1. Graphing / Plotting Complex Numbers in a Complex Plane 2. Real Axis vs Imaginary Axis 3. How To Find The Absolute Value of a Complex Number 4. Complex Numbers - Rectangular Form to Polar Form 5. Converting Complex Numbers in Polar Form To Rectangular Form 6. Complex Numbers - List of Equations and Formulas 7. Finding R and Angle Theta From a and b 8. Writing Complex Numbers In Rectangular Form 9. Product of Two Complex Numbers In Polar Form Equation 10. Quotient of Two Complex Numbers In Polar Form Formula 11. Finding Products of Complex Numbers in Polar Form 12. Finding Quotients of Complex Numbers in Polar Form 13. Powers of Complex Numbers in Polar Form 14. De Moivre's Theorem - Roots of Complex Numbers in Polar Form 15. Solving Equations With Complex Numbers 16. Adding Complex Numbers in Polar Form 17. Multiplying Complex Numbers in Polar Form 18. Dividing Complex Numbers in Polar Form

          How To Solve Linear Equations In Algebra

          By The Organic Chemistry Tutor

          This algebra video explains how to solve linear equations. It contains plenty of examples and practice problems.

              3rd Grade Math Rap

              By McCarthy Math Academy

              With a little help from the group, Mindless Behavior, I have created a math video with lyrics to help my students to understand and apply core math skills for third grade. People of all ages can jam out to this one. Enjoy!

              I've got a case of the operation blues.
              Because I don't know which one I should use.
              Look at the word problem for the clues.
              The key words tell you how to choose.

              Each means you multiply or you must divide.
              Tryna find the total? Then you multiply
              Total's in the problem? Then you must divide.
              Not quick to solve it, draw it, get it right.

              Addition's easy for me and you
              Sum, In all, together, and total too.
              When do you subtract? How many more?
              Fewer? Left? Less? Difference in a score?

              Place value's next. Disco on the " dess "
              Ones, tens, hundreds, to the left
              Thousands, Ten thousands, hundred...thousand
              Say the name of the place, yeah.

              The value's the amount of the place
              For example, 2,060.
              The value of the 2 is 2-0-0-0,
              The value of the 6 is 6-0.

              When you round, find and underline the place
              Spotlight to the right, decide the digit's fate
              5 or more, add 1 to the rounding place
              4 or less, do nothing but walk away, (estimate)

              A pen, penny is one, one cent
              A Nic-kel is five, a dime is ten cents
              25 for a quarter, George Washington
              100 cents makes a dollar, there he goes again.

              For pictographs, you gotta check out the key
              One smiley face might really equal three
              For bar graphs, pay attention to the scale
              Think it's counting by ones, huh, you'll fail

              Fractions are easy, just draw your best.
              Here they go from least to greatest
              1/12, 1/6, ¼, 1/3,
              ½, 2/3, ¾, Fraction nerd!

              You see that number on top,
              That's called the numerator
              It describes the amount
              That is being considered
              And if you jump down from the fraction bar
              It's the total number of equal parts.

              Let me give you an example:
              Leslie Moin has some coins
              A total of 9
              2 happen to be pennies
              While 7 are dimes.
              What's the fraction of dimes?
              How many coins? 9
              How many dimes? 7
              Say the fraction -- seven ninths

              Length times width is Area
              Distance around is Perimeter
              Break down the GEOMETRY

              3 sides makes triangle
              4 sides = quadrilateral
              5 pentagon, 6 hexagon
              8 octagon, 10 decagon

              Lines that never cross - PARALLEL
              Lines that meet or cross - INTERSECTING
              Lines that form right angles -- PERPENDICULAR

              Same shape, same size -- CONGRUENT
              Line that cuts in half - SYMMETRY
              Up and Down - VERTICAL
              Left to Right -- HORIZONTAL

              An angle less than right - ACUTE
              An angle opened wide - OBTUSE
              Ninety degrees square corner - RIGHT ANGLE

              Back to triangles
              3 sides the same = equilateral
              2 sides the same = isosceles
              no sides the same = Hey, that's a scalene right!

              So, that's it.
              That's our math song.
              Before we leave,
              Remember to read
              Your math problems three times before you answer.
              That way you know what the problem
              Is asking you to do.
              Don't be lazy, be brilliant.
              Piece! Like a fraction.