standard_description: Explain patterns in the number of zeros of the product when multiplying a number by powers of 10, and explain patterns in the placement of the decimal point when a decimal is multiplied or divided by a power of 10. Use whole-number exponents to denote powers of 10.
problem_activity: Solve. Show or explain your work.
a.   42 × 3
b.   6 × 215
c.   2,039 × 8


aligns: no