Lumos Video Store
This page provides a list of educational videos related to Estimating Fractional Parts. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to Estimating Fractional Parts.
Estimate the Product of Mixed Numbers
By MathwithMrAlmeida
Use your number sense to estimate what the product will be. A great skill to have to check your work!
Subtracting Mixed Numbers With Regrouping
By eHow
When subtracting mixed numbers with regrouping solve the equation of the fractions before working on the whole numbers. A math instructor explains how to create a matching denominator to subtract mixed numbers. He shows examples with paper and marker. Example included: 10 2/7 - 6 4/7.
Subtracting Mixed Numbers - YourTeacher.com - Pre Algebra Help
By yourteachermathhelp
For a complete lesson on subtracting mixed numbers go to http://www.yourteacher.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson students learn to subtract mixed numbers by first subtracting the fractions then subtracting the whole numbers. For example to subtract 6 1/3 - 4 2/3 first subtract 1/3 � 2/3. However notice that 1/3 � 2/3 equals a negative fraction. In this situation the first fraction 6 1/3 can be rewritten as 5 + 1 1/3 or 5 + 4/3 or 5 4/3. Therefore the original problem 6 1/3 - 4 2/3 can be rewritten as 5 4/3 - 4 2/3. Now subtract the fractions 4/3 � 2/3 to get 2/3 and subtract the whole numbers 5 �4 to get 1. So 5 4/3 - 4 2/3 = 1 2/3. Note that some of the problems in this lesson also require the student to find a common denominator for the fractions. For example 8 5/16 - 1 1/8.
How To Solve Doppler Effect Physics Problems
By The Organic Chemistry Tutor
This physics video tutorial provides a basic introduction into the doppler effect of moving sound waves. it explains how to solve doppler effect problems in physics. Any time the source moves toward the observer or if the observer moves toward the source, the detected frequency will increase - that is - the observed frequency will be greater than the frequency emitted by the source. The source can be an ambulance truck or a police siren. If the source moves away from the observer or if the observer moves away from the source, the detected frequency will decrease. This video contains plenty of examples and practice problems of calculated the frequency detected by the observer.
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.
Adding Mixed Numbers with Uncommon Denominators
By Davitily
The instructor uses an electronic chalkboard to demonstrate how to add mixed numbers with uncommon denominators. One example is modeled using astep by step approach to walk the learner through this process of adding the whole numbers first and then finding the common denominator to add the remaining fractions together.
Adding Mixed Numbers - YourTeacher.com - Pre Algebra Help
By yourteachermathhelp
For a complete lesson on adding mixed numbers go to http://www.yourteacher.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson students learn to add mixed numbers by first adding the fractions then adding the whole numbers. For example to add 4 2/5 + 7 4/5 first add 2/5 + 4/5 to get 6/5 then add 4 + 7 to get 11. So 4 2/5 + 7 4/5 = 11 6/5. Notice however that the answer 11 6/5 contains an improper fraction 6/5 which is the same as 1 1/5 so 11 6/5 can be rewritten as 11 + 1 1/5 which simplifies to 12 1/5. So 4 2/5 + 7 4/5 = 12 1/5. Note that some of the problems in this lesson also require the student to find a common denominator for the fractions. For example 5 1/4 + 6 3/8.
Division - The Area Model Word Problems with Single Digit Divisors (4-NBT-B-6)
By Worksheets and Walkthroughs
This video walkthrough lesson shows you how to use the area model to solve division problems with single digit divisors. Please visit www.worksheetsandwalkthroughs.com to print out the worksheet for this video and others. Also check out our
The Simple Pendulum
By The Organic Chemistry Tutor
This physics video tutorial discusses the simple harmonic motion of a pendulum. It provides the equations that you need to calculate the period, frequency, and length of a pendulum on Earth, the Moon, or another planet. This video contains plenty of examples and practice problems.
Financing California: K-12 Education
By Lumos Learning
Spending on K-12 education accounts for 40% of California's budget. With spending per capita and performance falling, a panel of experts discusses the future of K-12 education. Series: "Travers Conference in Ethics and Accountability