Exploring Rational Expressions: Addition and Subtraction

Miss Cha introduces the math note toolkit and guides students through converting between fractions, decimals, and percents. The video covers methods for converting decimals to percents, fractions to percents, terminating decimals to fractions, and fractions to decimals, emphasizing the importance of simplification and understanding the relationships between these forms.

What should you do if you haven't received your Math Note Toolkit from school?

• Print out the PDF file linked in the playlist.

• Skip the lesson.

• Ask a friend for theirs.

• Wait until it arrives.

How do you convert a decimal to a percent?

• Subtract 100.

• Add 100.

• Multiply by 100.

• Divide by 100.

What is 0.46 as a percent?

• 4.6%

• 46%

• 0.046%

• 460%

How do you convert a percent to a decimal?

• Add 100.

• Multiply by 100.

• Subtract 100.

• Divide by 100.

What is 24.6% as a decimal?

• 0.246

• 2.46

• 24.6

• 0.0246

What must you do to the denominator of a fraction to convert it to a percent?

• Change it to 10.

• Change it to 100.

• Change it to 1000.

• Change it to 1.

What is 3/5 as a percent?

• 75%

• 60%

• 30%

• 50%

How do you convert a terminating decimal to a fraction?

• Divide by 10.

• Multiply by 10.

• Place the decimal over 1000 and simplify.

• Place the decimal over 100 and simplify.

What is 0.45 as a fraction?

• 9/20

• 45/100

• 1/2

• 5/9

How do you convert a fraction to a decimal?

• Divide the numerator by the denominator.

• Multiply the numerator by the denominator.

• Subtract the numerator from the denominator.

• Add the numerator and the denominator.