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Khan Academy (English - US curriculum)
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Khan Academy (English - US curriculum)
Math by grade
Illustrative Mathematics
6th grade (Illustrative Mathematics)
Unit 6: Expressions and equations
Lesson 6: Write expressions where letters stand for numbers
Lesson 6: Write expressions where letters stand for numbers
Model with one-step equations
What is a variable?
Evaluating an expression with one variable
Evaluating expressions with one variable
Writing basic expressions word problems
Writing basic expressions word problems
