Adding and Subtracting Rational Expressions

What is the first step when adding or subtracting mixed numbers?

• Simplify the fractions

• Convert mixed numbers to improper fractions

• Multiply the fractions

• Find the least common multiple

What is the least common multiple (LCM) of 2 and 5?

• 15

• 5

• 20

• 10

When multiplying fractions, what should you do after converting mixed numbers to improper fractions?

• Subtract the fractions

• Multiply straight across

• Add the fractions

• Find a common denominator

What is the result of multiplying 33/8 by -7/3?

• -77/8

• -231/24

• -70/8

• -77/24

Nick was scuba diving at -32.5 feet and descends another 8.6 feet. What is his new location?

• -41.1 feet

• -40.1 feet

• -40.6 feet

• -41.6 feet

Melanie cuts a 6.5 inch piece of yarn from a 15.75 inch string. How much yarn is left?

• 8.75 inches

• 8.25 inches

• 9.25 inches

• 9.75 inches

Caroline's baby sister sleeps 5/8 of the day. How many hours does she sleep?

• 20 hours

• 15 hours

• 12 hours

• 18 hours

Lucy brought 2.75 batches of cookies and 5/6 were eaten. How many batches are left?

• 0.45 batches

• 1.25 batches

• 0.75 batches

• 1.15 batches

A square has a side length of 5.25 inches. What is its area?

• 27.56 square inches

• 28.56 square inches

• 27.25 square inches

• 28.25 square inches

Kevin ran 1 5/6 miles and Justin ran 1 2/5 miles. How much further did Kevin run?

• 0.4 miles

• 0.5 miles

• 0.3 miles

• 0.6 miles