Study Pug
Study Pug: Understanding the Number Systems
Numbers can be categorized more specifically into different number systems, for instances, natural numbers, whole numbers, integers, rational numbers, and irrational numbers. In this video, you will learn how to classify numbers into...
Study Pug
Study Pug: Multiplying Fractions and Whole Numbers
This video walks you through the four main steps when multiplying fractions with whole numbers. Includes explanations, examples and practice problems. [1:00]
Khan Academy
Khan Academy: Classifying Numbers: Rational and Irrational
Given a set of numbers, learn how to tell which are rational and which are irrational. [2:17]
Khan Academy
Khan Academy: Intro to Rational and Irrational Numbers
Explains what rational and irrational numbers are and the difference between them. [5:55]
PBS
Pbs Learning Media: Converting Rational Numbers
Students learn how to use division and place value to convert fractions to decimals. [1:54]
Khan Academy
Khan Academy: Analyzing Structure Word Problem: Pet Store (2 of 2)
Sal solves a word problem about the unknown number of bears, cats, and dogs in a pet store. This is part 2 where Sal uses an algebraic reasoning.
Khan Academy
Khan Academy: Analyzing Structure Word Problem: Pet Store (1 of 2)
Sal solves a word problem about the unknown number of bears, cats, and dogs in a pet store. This is part 1 where Sal uses a visual reasoning.
Khan Academy
Khan Academy: Adding Rational Expression: Unlike Denominators
Sal rewrites (5x)/(2x-3)+(-4x^2)(3x+1) as (-8x^3+27x^2+5x)/(2x-3)(3x+1).
Khan Academy
Khan Academy: Adding & Subtracting Rational Expressions: Like Denominators
Sal adds 6/(2x^2-7) + (-3x-8)/(2x^2-7) and subtracts (9x^2+3)/(14x^2-9) - (-3x^2+5)/(14x^2-9).
Khan Academy
Khan Academy: Adding & Subtracting Negative Numbers
Learn how to add and subtract negative numbers. The problems solved in this video are 2 - 3 = -1 and -2 - 3 = -5 and -2 + 3 = 1 and 2 - (-3) = 5 and -2 - (-3).
Khan Academy
Khan Academy: Adding Negative Numbers on the Number Line
Sal shows how to model 6 + (-2) using vertical number lines.
Khan Academy
Khan Academy: Adding Fractions With Different Signs
Use a number line to add fractions with different signs.
Khan Academy
Khan Academy: Adding & Subtracting Fractions
Add and subtract negative fractions with unlike denominators.
Khan Academy
Khan Academy: Adding Negative Numbers Example
Use a number line to add -15 + (-46) + (-29).
Khan Academy
Khan Academy: Adding Numbers With Different Signs
Use a number line to add 15 + (-46) + 29.
Khan Academy
Khan Academy: Addition & Subtraction: Find the Missing Value (Part 1 of 2)
Sal solves some missing value problems: -1 = 7 - __ and -10 + __ = -5 and 4 = -2 + __ and 6 + __ = -8.
Khan Academy
Khan Academy: Addition & Subtraction: Find the Missing Value (Part 2 of 2)
Sal solves more missing value problems: 4 = -8 - __ and __ - (-2) = -7 and -4 = __ - 9.
Khan Academy
Khan Academy: Absolute Value as Distance Between Numbers
In this video, we think about what |a-b| really means, and we verify that |a-b| = |b-a| by looking at an example.
Khan Academy
Khan Academy: Adding & Subtracting Rational Numbers: 0.79 4/3 1/2 + 150%
Sal evaluates 0.79 - 4/3 - 1/2 + 150%.
Khan Academy
Khan Academy: Adding & Subtracting Rational Numbers: 79% 79.1 58 1/10
Sal evaluates 79% - 79.1 - 58 1/10.
Khan Academy
Khan Academy: Adding & Subtracting Decimals Word Problem
Let's get fancy and practice adding and subtracting decimals in the same word problem.
Khan Academy
Khan Academy: Adding Decimals Word Problem
Here's a simple word problem asking us to put our adding decimals skill to work.
Khan Academy
Khan Academy: Adding Decimals: 0.822+5.65
Sal solves 0.822+5.65 using 'standard algorithm'.
Khan Academy
Khan Academy: Adding Decimals: 9.087+15.31
Sal solves 9.087+15.31 using the 'standard algorithm'.