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Subtracting mixed numbers with like denominators | Fractions | Pre-Algebra | Khan Academy
By Khan Academy
subtract fractions with like denominators
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!
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.
One-step addition and subtraction equations with fractions and decimals
By Khan Academy
Learn how to solve one-step addition and subtraction equations by adding or subtracting the same thing from both sides of the equation.
One-step addition and subtraction equations with fractions and decimals
By Khan Academy
Learn how to solve this equation: a + 5 = 54������������
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.
Total seats in a theater | Multiplication and division
By Khan Academy
Solve a two-step word problem by drawing a picture and creating an equation.
Marbles for friends | Multiplication and division
By Khan Academy
Solve a two-step estimation word problem.
Running distance in a week | Multiplication and division
By Khan Academy
Solve a two-step word problem by drawing a picture and creating an equation.
08 - Learn Synthetic Division of Polynomials - Part 1
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
05 - Simplify Irrational Exponents, Part 1 (Radical Exponents, Powers, Pi & More)
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
05 - Polynomial Long Division - Part 1 (Division of Polynomials Explained)
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
16 - Add and Multiply Complex Numbers - Part 1
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
14 - Solve Quadratic Systems of Equations by Addition - Part 1 (Simultaneous Equations)
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!