Lumos Video Store
This page provides a list of educational videos related to Add Subtract decimal. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to Add Subtract decimal.
Adding and Subtracting Decimals
By TeacherTube Math
This video is from the TeacherTube website and the instructor shows how to add and subtract decimals. She shows how to line up the decimal points in the numbers. Instructor appears to be using computer software for demonstration.
Subtracting decimals 2
By Khan Academy
Just like when add, be sure you align decimals before subtracting.
Addition and subtraction with significant figures | Decimals | Pre-Algebra | Khan Academy
By Khan Academy
This video shows us the rules for adding and subtracting measurements to show our level of accuracy. Note that the rules for addition/subtraction with significant figures are VERY different than the rules for mulitplication/division. Think about which number is the most precise!
Subtracting 1 vs. subtracting 10 | Addition and subtraction within 100
By Khan Academy
Sal talks about the difference between subtracting 1 and subtracting 10.
Missing numbers in addition and subtraction | 2nd grade | Khan Academy
By Khan Academy
Sal solves missing number in problems like 73 = ___ + 57.
Relate addition and subtraction
By Khan Academy
See the relationship between 2+3=5, 5-2=3, and 5-3=2.
Addition and subtraction trig identities
By Khan Academy
Sal evaluates the cosine of twice an������������angle whose right triangle is given. To do this, he must use the cosine double-angle formula.
Addition and subtraction trig identities
By Khan Academy
Sal evaluates the cosine of the sum of 60������������ and another angle whose right triangle is given. To do this, he must use the cosine angle addition formula.
Addition and subtraction with number lines
By Khan Academy
Sal figures out which number line matches up with a 2-digit addition or subtraction problem.
More examples of addition and subtraction of polynomials | Algebra II | Khan Academy
By Khan Academy
This instructor in this video, Sal Khan, discusses adding and subtracting polynomials. In an easy, conversational tone, the instructor explains processes clearly. Mr. Khan uses the Paint Program (with different colors) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. The student or educator may want to open the video to 'full screen' as the instructor is using a black background and the writing is small.
Addition and subtraction trig identities
By Khan Academy
Sal reviews all the different trigonometric angle addition identities: sin(a+b), sin(a-c), cos(a+b), cos(a-b), cos(2a), and sin(2a).
Addition & Subtraction of Mixed Numbers: With Same Denominators
By Red River College -Tutoring
Addition & Subtraction of Mixed Numbers: With Same Denominators
solve word problems using addition and subtraction of fractions
By Kathleen Twyman
how to solve a word problem using addition and subtraction of fractions
ADDITION & SUBTRACTION OF RATIONAL EXPRESSIONS WITH DIFFERENT DENOMINATORS (ANIMATION)
By Jerry Llevada
ADDITION & SUBTRACTION OF RATIONAL EXPRESSIONS WITH DIFFERENT DENOMINATORS (ANIMATION)
Subtracting 1 vs. subtracting 10 | Addition and subtraction within 100 | 2nd grade | Khan Academy
By Khan Academy
Sal talks about the difference between subtracting 1 and subtracting 10.
One-step addition and subtraction equations with fractions and decimals
By Khan Academy
Some quick examples to practice solving a variety of one step equations. All 4 operations (add, subtract, multiple, divide) are paired with variables.
One-step addition and subtraction equations with fractions and decimals
By Khan Academy
Learn how to solve one-step addition and subtraction equations that have fractions and decimals in them.