Sample response: The student did not distribute the negative when subtracting. Distributing the negative,
the expression is equal to 6b + 4r – 2b – r. Then use
the commutative property to rewrite it as 6b – 2b + 4r
- r. Then you can use the distributive property to write
Which did you consider in your response? Check all
that apply.
When subtracting an expression in parentheses,
you need to distribute the negative.
You can use properties of operations to rearrange
the expression and group like terms in order to
combine them.