GRE Arithmetic: Fractions (Part 2 of 5)

This video tutorial covers the addition and subtraction of fractions. It begins with examples of adding and subtracting fractions with the same denominator, emphasizing the simplicity of adding or subtracting numerators while keeping the denominator constant. The tutorial then progresses to handling fractions with different denominators, explaining the process of finding a common denominator, preferably the least common multiple, to facilitate addition or subtraction. The video also demonstrates how to add and subtract more than two fractions with different denominators. Finally, it provides a brief preview of the next video, which will focus on multiplying fractions.

What is the result of adding 1/10 and 2/10?

• 4/10

• 3/10

• 2/10

• 1/10

How do you add fractions with the same denominator?

• Multiply the numerators and add the denominators

• Subtract the numerators and add the denominators

• Add the denominators and keep the numerators the same

• Add the numerators and keep the denominators the same

What is the least common multiple of 3 and 4?

• 12

• 9

• 15

• 6

When adding fractions with different denominators, what is the first step?

• Multiply the fractions

• Find a common denominator

• Add the numerators directly

• Subtract the denominators

What is the result of subtracting 1/3 from 2/5 using a common denominator?

• -1/5

• 1/5

• -1/15

• 1/15

What is the least common multiple of 3, 5, and 2?

• 30

• 25

• 20

• 15

How do you handle multiple fractions with different denominators?

• Multiply all fractions together

• Subtract all numerators and add denominators

• Find a common denominator for all fractions

• Add all numerators and denominators directly