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Add and subtract polynomials with two variables
By Khan Academy
Sal simplifies (4x^2y - 3xy + 25) - (9y^2x + 7xy - 20).
DEPRECATED Adding and subtracting rational expressions 3
By Khan Academy
U11_L1_T3_we2 Adding and Subtracting Rational Expressions 2
Comparing numbers represented in different ways | 4th grade | Khan Academy
By Khan Academy
Examples of Khan Academy practice problems where you compare decimals, fractions, and number diagrams.
Comparing with multiplication: ages and heights | 4th grade | Khan Academy
By Khan Academy
You'll learn that sometimes multiplication is used as a way of comparing two things. In these 2 examples, we're comparing age and height.
Comparing rates
By Khan Academy
Finding a unit rate is a skill often required in real life. How fast is that plane flying? How many lawns can you mow in an afternoon? You see, with our knowledge of ratios and fractions, we can now solve unit rates problems like this.
Comparing linear functions
By Khan Academy
Sal is given the formula of a linear function and the graph of another, and is asked to determine which function increases faster.
Compound inequalities
By Khan Academy
Sal solves the compound inequality 5z+7<27 OR -3z���������������������18.
Average rate of change word problems
By Khan Academy
Sal compares the average rates of a change of a function that models temperature for different time intervals.
Converting mixed numbers and improper fractions
By Khan Academy
Worked examples comparing improper fractions and mixed numbers