Inequalities are statements using greater than or less than - they contain multiple solutions. We use an open circle on the number line to represent < or > and a closed circle to represent greater than or equal to, less than or equal to.
Don't forget to flip the sign of the inequality if you are multiplying or dividing by a negative number!
In compound inequalities, "and" is when the arrows come together on the number line, and "or" is when they go in the opposite direction.
In equations or inequalities that contain fractions, you can always multiply out the denominator rather than changing it into a decimal. Not necessary but it's a nice trick to use if you like working with whole numbers rather than decimals.
No comments:
Post a Comment