Operations with Fractions and Multiplication

The video tutorial explains how to subtract fractions with different denominators by finding a common denominator using the least common multiple (LCM). It demonstrates adjusting the numerators accordingly and performing the subtraction. The final result is simplified, and the process is verified to ensure accuracy.

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

• Subtract the denominators

• Find a common denominator

• Multiply the fractions

• Add the numerators directly

What is the least common multiple of 12 and 13?

• 156

• 25

• 13

• 12

What is the product of 12 and 13?

• 144

• 150

• 156

• 160

If you multiply the denominator by 13, what should you do to the numerator?

• Divide it by 13

• Multiply it by 13

• Add 13 to it

• Subtract 13 from it

What is the result of 7 times 13?

• 70

• 84

• 91

• 100

What is the result of 12 times 6?

• 60

• 66

• 72

• 78

What operation is performed after finding a common denominator?

• Multiplication

• Addition

• Division

• Subtraction

What is the result of subtracting 72 from 91?

• 19

• 20

• 18

• 21

What is the final simplified form of the fraction 19 over 156?

• 1/8

• 1/13

• 19/156

• 19/13

Why is 19 considered a prime number?

• It is even

• It has no divisors other than 1 and itself

• It is a multiple of 3

• It is less than 20