Exploring Adding and Subtracting Rational Expressions

This lesson covers the conversion between fractions, decimals, and percents, along with a review of decimal operations. It explains how to convert fractions to decimals by dividing the numerator by the denominator, and how to convert decimals to percents by moving the decimal point. The lesson also includes converting percents to fractions and vice versa. Additionally, it reviews operations with decimals, such as addition, subtraction, multiplication, and division, emphasizing the importance of aligning decimal points. The lesson concludes with practice problems to reinforce the concepts.

What is the first step in converting a fraction to a decimal?

• Multiply the numerator by the denominator

• Add the numerator and the denominator

• Subtract the denominator from the numerator

• Divide the numerator by the denominator

Tags

CCSS.7.NS.A.2D

CCSS.8.NS.A.1

How do you convert a decimal to a percent?

• Move the decimal point two places to the right

• Move the decimal point two places to the left

• Divide by 100

• Multiply by 1000

What is 0.24 as a fraction in simplest form?

• 6/25

• 24/100

• 12/50

• 3/25

What is 4.5% as a decimal?

• 0.0045

• 4.5

• 0.45

• 0.045

How do you convert 2/3 to a decimal?

• Multiply 2 by 0.3

• Divide 3 by 2

• Divide 2 by 3

• Multiply 2 by 3

Tags

CCSS.7.NS.A.2D

CCSS.8.NS.A.1

When adding decimals, what is important to remember?

• Subtract the smaller decimal from the larger one

• Line up the decimal points

• Multiply the decimals first

• Ignore the decimal points

Tags

CCSS.5.NBT.B.7

What is the result of 1.9 + 6.82?

• 8.91

• 8.81

• 8.72

• 8.71

Tags

CCSS.6.NS.B.3

How do you handle decimal points when multiplying decimals?

• Move the decimal point to the left in the answer

• Move the decimal point to the right in the answer

• Ignore them completely

• Count the total number of decimal places in the factors and move the decimal point in the answer accordingly

Tags

CCSS.6.NS.B.3

What is the product of 5.27 and 9?

• 47.73

• 47.63

• 47.53

• 47.43

Tags

CCSS.5.NBT.B.7

How do you divide a number by a decimal?

• Multiply the divisor by 10

• Move the decimal point in the divisor to the left and adjust the dividend accordingly

• Move the decimal point in the divisor to the right and adjust the dividend accordingly

• Ignore the decimal point in the divisor

Tags

CCSS.6.NS.B.2

CCSS.5.NBT.B.6