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Chapter 2. Match the material with the best description of it. Each descriptor can be used only once. The descriptors are: element, ion, polyatomic ion, and isotope. carbon-12 and carbon-13 are examples of [one] perchlorate is an example of [two] F2 is an example of [three] chromium (V) is an example of [four]    

Use the distributive property to FACTOR

Solve 52-17 using the manipulative blocks below.

Explain how the model below can be used to illustrate that 7 = 18-11.

In new math textbooks, there is an emphasis on mental mathematics and estimation.  Explain why this might be important for today’s students.  

During his first year of college, John incurs the following expenses:  $3000 on tuition, $1000 on books, $3600 on food, and $8000 on rent.  If John earned $9000 during the year by working part-time, and the rest of the expenses were paid by his parents, how much did his parents pay?

Simplify the following.  Leave the answer as a power.

What multiplication is suggested by the below model:

Decide which property is illustrated. (6x)(y+15) = (6x)(y)+(6x)(15)

Subtract using a number line. 10 – 3