
From Mammoth2020 on July 9th, 2020
0 0 likes  13 13 playsThis is a beginner lesson for prealgebra or 7th grade math — onestep equations that are solved by multiplying or dividing. First, I explain how we simplify… 
From Mammoth2020 on July 9th, 2020
0 0 likes  0 0 playsI teach how to solve simple linear equations where the unknown x only appears once, and can be solved by either adding the same number to both sides of the equation,… 
From Mammoth2020 on June 29th, 2020
0 0 likes  32 32 playsThis is a beginner video lesson (prealgebra or 7th grade) explaining: WHAT are equations? What is the general idea as to how we solve equations? An equation is of the… 
From Mammoth2020 on June 26th, 2020
0 0 likes  23 23 playsIn this basic lesson I show several examples of using the distributive property of multiplication over addition, including an area model (rectangles). Lastly we even… 
From Mammoth2020 on June 25th, 2020
0 0 likes  0 0 playsIn this second part we will solve more challenging examples that have more operations than the ones in part 1. The expressions include exponents plus other… 
From Mammoth2020 on June 25th, 2020
0 0 likes  1 1 playsThis is the first part of the lesson on the order of operations. I start out with a minireview of exponents and then we study the order of operations (PEMDAS rule),… 
From Mammoth2020 on June 25th, 2020
0 0 likes  5 5 playsThis is a prealgebra math lesson where I show how to write an equation to match a written sentence (2 example problems). Then we look at mathematical expressions that… 
From Mammoth2020 on June 24th, 2020
0 0 likes  26 26 playsThis video lesson explains the difference between an expression and equation, gives examples of both, and shows how to write expressions from verbal descriptions. In a…