Math Student Help

Samples of videos from my kids CD & DVD “Kids Multiplication Motivation.” Hip-hop, R&B, & reggae songs to help kids with multiplication, skip-counting, & division. Available at www.msjonesproductions.com

Duration : 0:4:58

(more…)

Examination for blood flow in feminal arteries.

Taken from the free online course Imaging in medicine. For more, visit The Open University’s OpenLearn website.

http://openlearn.open.ac.uk/S809_1

http://www.open.ac.uk/use

-

Duration : 0:2:42

(more…)

79-80, mean and standard deviation

Duration : 0:7:48

(more…)

I know this sounds really stupid, but me and my mom are having an argument about how to do simple third grade math.I’m in 7th grade and never learned fractions right. Here’s the question : 5/9 = 2 3/4. I thought you changed the mixed number into an improper fraction, add the fractions together, and then divide your numerator by the denominator (since the top on is bigger in this case) and what you got would be the whole number, then the number after the point would be the numerator, then the denominator would be the same.

First of all 2 3/4 does NOT equal 5/9.
The improper fraction for it would be 11/4 (you multiply 2 times 4 and add the 3, so you have 8 +3 =11, and place it over the 4 to give you the 11/4.
5/9 is a proper fraction by itself. 9/5 would be the improper fraction because it comes out to 1 4/5.

To add together 5/9 and 2 3/4:
1. change the improper fraction to 11/4
2. find the **lowest common multiple between the 2 of them, which in this case is 36. (http://www.mathsisfun.com/least-common-multiple-tool.html)
3. change 5/9 to 20/36 (9 times 4 = 36 and 4 times 5=20).
4.do the same for 11/4 (4 times 9 =36; 11 times 9 =99) to make 99/36
5. add the two together : 20/36 + 99/36 (keeping the same denominator ) to equal 119/36.
6. Reduce the 119/36 (3 times 36 = 108), so you have 3 11/36 as your answer because 11/36 cannot be reduced any further.

For more "expert help" go to http://www.mathsisfun.com/fractions_addition.html

Other topics at the site:
Introduction to Fractions
Simplifying Fractions
Equivalent Fractions
Least Common Multiple
Least Common Multiple Tool
Least Common Denominator
Subtracting Fractions
Multiplying Fractions
Dividing Fractions
Fractions Index

**Definition of Least Common Multiple, with examples: http://www.mathsisfun.com/least-common-multiple.html

I need to test myself on my fractions and I don’t know if my answers are correct. How do I do fractions on a calculator to find out?

Well, since fractions are equivalent to divisions, just substitute every fraction separator (as in 1/4) with a divisor (as in 1÷4).

When I select all of the worksheets the option to password protect goes away. Is there a code? Thank you!

Try this macro. Change the password to suit, or eliminate if desired.

Open the workbook.

Copy this macro to the clipboard:

Sub Protect_All_Sheets()
Dim ws As Worksheet
For Each ws In ActiveWorkbook.Worksheets
ws.Protect Password:="Your word"
Next ws
End Sub

Select the appropriate worksheet and right click on the sheet tab.

Click ‘View Code’.

Paste the macro into th module area to the right.

Close back to Excel.

Go to Tools > Macros > Macro

Highlight this macro, if it is not already highlighted.

Click ‘Options’

Select a letter to be used as a keyboard shortcut.

Close back to Excel.

Press Ctrl + your letter to protect all sheets.

To unprotect all sheets in the same manner, use this macro and assign a different keyboard shortcut letter.

Sub Unprotect_All_Sheets()
Dim ws As Worksheet
For Each ws In ActiveWorkbook.Worksheets
ws.Unprotect Password:="Your word"
Next ws
End Sub

This is a little embarrassing being 39 years old and all but I noticed I’ve been using calculators for so many years I’ve forgotten the basics.

These are partially completed long divisions:

http://neoparaiso.com/imprimir/long-division-worksheets.html

These, partially completed multiplications:

http://neoparaiso.com/imprimir/division-multiplicacion-cifras.html

You can check your answers with each second page. Click on the PDF icons.

Story

Duration : 0:5:20

(more…)

1-3, deductive reasoning and congruent angles

Duration : 0:10:17

(more…)

This video contains numerous examples of how to convert percents into fractions and decimals.

Duration : 0:7:1

(more…)