How to combine like terms

1.1   Negative numbers introduction

1.2   Placing positive and negative decimals on a number line

1.3   Decimals and fractions on a number line

1.4   Opposite of a number

1.5   Negative symbol as opposite

1.6   Absolute value of integers

1.7   Comparing absolute values

1.8   Adding fractions with unlike denominators introduction

1.9   Adding fractions with unlike denominators

1.10   Subtracting fractions with unlike denominators introduction

1.11   Subtracting fractions with unlike denominators

1.12   Multiplying two fractions: example

1.13   How to multiply mixed numbers

1.14   Understanding fractions as division

1.15   Creating a fraction through division of whole numbers

1.16   Understanding division of fractions

1.17   Dividing fractions example

1.18   Dividing fractions example 2

1.19   Dividing mixed numbers example

1.20   Adding decimals word problem

1.21   Adding and subtracting decimals word problem

1.22   Finding a percentage

1.23   Percentage of a whole number

1.24   Percent word problem example 4

1.25   Solving percent problems

1.26   Percent word problem example 2

1.27   Equivalent ratios

1.28   Ratios for recipes

1.29   Ratio word problem examples

1.30   Understanding equivalent ratios

1.31   Ratios on coordinate plane

1.32   Ratios and measurement

1.33   Ratios as fractions

1.34   Ratio word problem: boys to girls

1.35   Introduction to rates

1.36   Solving unit rates problem

1.37   Solving unit price problem

1.38   Rate problems

1.39   Practice computing and comparing rates

1.40   Dependent and independent variables exercise: the basics

1.41   Dependent and independent variables exercise: graphing the equation

1.42   Dependent and independent variables exercise: express the graph as an equation

1.43   Combining like terms introduction

1.44   The distributive law of multiplication over addition

1.45   The distributive law of multiplication over subtraction

1.46   How to use the distributive property with variables

1.48   How to simplify a big expression by combining like terms

1.49   How to find equivalent expressions by combining like terms and using the distributive property

1.50   How to solve one-step equations

1.51   Example of solving a one-step equation

1.52   How to solve equations of the form ax = b

1.53   How to solve equations of the form x/a = b

1.54   How to find mistakes in one step equations

1.55   How to write one-step equations for word problems

1.56   How to test solutions to inequalities

1.57   How to describe real-world situations with inequalities

1.58   Solving for an angle

1.59   Decomposing angles

1.60   Area of parallelograms intuition

1.61   Area of triangles intuition

1.62   Example finding area of triangle

1.63   Finding area by rearranging parts

1.64   Finding area by breaking up the shape

1.65   Volume of a rectangular prism: fractional dimensions

1.66   How volume changes from changing dimensions

1.67   Nets of polyhedra

1.68   Finding surface area using net

1.69   Finding surface area: nets of polyhedra

1.70   Surface area of a box

1.71   Surface area of a box using nets

1.72   Statistical questions

1.73   Thinking about shapes of distributions

1.74   Examples analyzing clusters, gaps, peaks and outliers for distributions