DEV Video Worksheets Lessons 12-21
 Lesson 12 a decimal decimals dividing division dividing by powers of ten b decimal decimals dividing division c decimal decimals dividing division
 Lesson 13 a decimals addition patterns subtraction patterns b decimals multiplication patterns c decimals division patterns d decimals word problems multiple steps
 Lesson 14 a ratios writing ratios writing ratios from words b ratios complex ratios c ratios complex ratios unit fraction d rate unit rate complex ratios e unit rates application of unit rates word problems

 Lesson 15 a property of proportions b proportions solve a proportion c solving proportions

 Lesson 16 a direct proportions propotional reasoning problems b direct proportions propotional reasoning problems c indirect proportions d direct proportions indirect proportions problem solving

 Lesson 17 a decimal fraction percent conversion b decimal fraction percent conversion c decimal fraction percent conversion d decimal fraction percent conversion e decimal fraction percent conversion

 Lesson 18 a solving percent expressions base rule b solving percent expressions proportional method c solving percent expressions equation method

 Lesson  19 a percents percent applications b percent formulas sales tax rate sales commission c percent terms simple interest compound interest d percent increase percent decrease

 Lesson 20 a measurements american units conversions length converting units dimensional analysis b measurements american units conversions weight volume converting units dimensional analysis c measurements american units conversions weight volume converting units dimensional analysis

 Lesson 21 a metric system metric abbreviations metric units b metric to metric conversions horizontal chart method c metric system weight volume horizontal chart d metric system common references for length weight & volume