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Subtracting mixed numbers with like denominators | Fractions | Pre-Algebra | Khan Academy

By Khan Academy

subtract fractions with like denominators

Algebra Basics: Solving Basic Equations Part 1 - Math Antics

Addition and subtraction with significant figures | Decimals | Pre-Algebra | 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 = 54ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½

Algebra Basics: Solving 2-Step Equations - Math Antics

By mathantics

Adding Rational Numbers

By Anywhere Math

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 ï¿½ 2/3. However notice that 1/3 ï¿½ 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 ï¿½ 2/3 to get 2/3 and subtract the whole numbers 5 ï¿½4 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.