Adding and Comparing Fractions

Teacher Gon explains how to add fractions with unlike denominators by finding the least common multiple (LCM). The video covers two examples: one with denominators 4 and 5, and another with denominators 9 and 3. The process involves converting fractions to have a common denominator, adding them, and simplifying the result if necessary. The video concludes with a practice problem for viewers to solve.

What is the first step in adding fractions with different denominators?

• Subtract the smaller fraction from the larger one

• Find a common denominator

• Add the numerators directly

• Multiply the fractions

What is the least common multiple of 4 and 5?

• 10

• 25

• 20

• 15

When adjusting the fraction 3/4 to have a denominator of 20, what should the numerator become?

• 12

• 15

• 20

• 18

What is the final result of adding 3/4 and 1/5?

• 18/20

• 19/20

• 20/20

• 21/20

What is the least common multiple of 3 and 9?

• 3

• 6

• 9

• 12

How do you convert the improper fraction 13/9 into a mixed number?

• 2 and 4/9

• 2 and 1/9

• 1 and 4/9

• 1 and 3/9

What is the result of adding 7/9 and 2/3?

• 13/9

• 16/9

• 15/9

• 14/9

What is the first step in solving the practice problem 1/3 + 1/6?

• Add the numerators

• Find the least common multiple

• Multiply the fractions

• Convert to improper fractions

What is the least common multiple of 3 and 6?

• 6

• 3

• 12

• 9

What is the sum of 1/3 and 1/6?

• 1/3

• 1/9

• 1/2

• 1/6