Lessons Fulfilling NCTM Standard 1c
Compute fluently and make reasonable estimates

Adding / Subtracting Rational Expressions
11 videos by 2 teachers 
Adding Complex Numbers
4 videos by 1 teacher 
Addition
19 videos by 4 teachers 
Complex Fractions / Simplifying Rational Expressions
15 videos by 4 teachers 
Computation Shortcuts
25 videos by 2 teachers 
Decimals
31 videos by 4 teachers 
Dividing Complex Numbers
4 videos by 2 teachers 
Dividing Fractions
13 videos by 6 teachers 
Division
10 videos by 3 teachers 
Equivalent Fractions / Reducing
17 videos by 8 teachers 
Evaluating Expressions
18 videos by 4 teachers 
Evaluating Rational Expressions
3 videos by 1 teacher 
Integer / Negative Exponents
8 videos by 4 teachers 
Intro to Exponents
6 videos by 3 teachers 
Intro to Fractions
14 videos by 5 teachers 
Intro to Polynomials
28 videos by 7 teachers 
Intro to Square Roots
39 videos by 5 teachers 
Introduction to Complex Numbers
6 videos by 2 teachers 
Least Common Multiple and Greatest Common Factor
11 videos by 4 teachers 
Like Terms
8 videos by 2 teachers 
Multiplication
19 videos by 7 teachers 
Multiplying / Dividing Rational Expressions
2 videos by 1 teacher 
Multiplying Complex Numbers
5 videos by 2 teachers 
Multiplying Fractions
14 videos by 7 teachers 
Numbers / Properties of Numbers
8 videos by 4 teachers 
Numbers and Estimates
7 videos by 4 teachers 
Numbers and Number Patterns
2 videos by 1 teacher 
Order of Operations
20 videos by 6 teachers 
Percents
30 videos by 4 teachers 
Polynomial Equations
27 videos by 6 teachers