Adding and Subtracting Rational Expressions

What is the first step in adding or subtracting fractions?

• Simplify the fraction

• Add or subtract the numerators

• Convert mixed numbers to improper fractions

• Find a common denominator

Tags

CCSS.7.NS.A.1C

If you have fractions with different denominators, what must you find?

• The product of the denominators

• The smallest numerator

• The least common multiple of the denominators

• The largest numerator

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

How do you adjust fractions to have a common denominator?

• Subtract the smaller denominator from the larger one

• Add the denominators together

• Divide the larger denominator by the smaller one

• Multiply both the numerator and denominator of one fraction

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the result of adding 1/4 and 2/3 when adjusted to a common denominator?

• 3/12

• 7/12

• 5/12

• 11/12

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

When subtracting fractions, what is the result of 3/10 - 11/15?

• -2/5

• -13/30

• 13/30

• 2/5

Tags

CCSS.7.NS.A.1C

How do you handle subtraction when dealing with mixed numbers?

• Only convert the fractions part and subtract

• Ignore the whole number and focus on the fractions

• Convert to improper fractions and find a common denominator

• Subtract the whole numbers separately

Tags

CCSS.7.NS.A.1C

In the context of the board trimming problem, what is the new length of the board after trimming?

• 1 and 5/6 feet

• 1 and 19/24 feet

• 2 and 5/8 feet

• 2 and 1/2 feet

Tags

CCSS.7.EE.B.3

What is the total snowfall during the two-day snowstorm?

• 12 inches

• 13 and 1/2 inches

• 15 inches

• 14 and 13/24 inches

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

After baking, how much milk does Natalie have left?

• 1/6 cup

• 5/6 cup

• 2/3 cup

• 1/2 cup

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the final step in the process of adding or subtracting fractions as discussed in the lesson?

• Convert to mixed numbers

• Simplify the fraction

• Add the numerators

• Find the common denominator

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2