Add Subtract three digit Videos - Free Educational Videos for Students in K - 12


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Add, subtract, multiply, and divide numerical radical terms


By Khan Academy

Sal shows how to group like terms to subtract and simplify radical terms, by simplifying the expression 4������������������(81x^5)-2������������������(81x^5)-������������������(x^3).

      Add, subtract, multiply, and divide numerical radical terms


      By Khan Academy

      Sal shows how to group like terms to add and simplify radical terms, by simplifying the expression ������������������(2x^2)+4������������������8+3������������������(2x^2)+������������������8.

          08 - Learn Synthetic Division of Polynomials - Part 1


          By Math and Science

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

              11 - Subtracting with Regrouping (Borrowing) - Part 1 (3rd Grade Math & 4th Grade Math)


              By Math and Science

              Quality Math And Science Videos that feature step-by-step example 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
                  Denominator
                  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.