Adding Fractions Using Cross Multiplication

The video tutorial explains a shortcut for adding fractions by using cross multiplication. It demonstrates how to multiply the numerators and denominators, add the results, and simplify the final fraction. The process involves multiplying the numerators across, adding the products, and then multiplying the denominators to find the final fraction in its simplest form.

What is the first step in the shortcut method for adding fractions?

• Add the numerators directly

• Cross multiply the numbers

• Multiply the fractions

• Subtract the denominators

When cross multiplying, what is the result of 4 times 3?

• 7

• 12

• 20

• 15

What do you do after cross multiplying the numbers?

• Subtract the results

• Divide the results

• Add the results

• Multiply the results

How do you calculate the denominator in this method?

• Divide the denominators

• Subtract the denominators

• Multiply the denominators

• Add the denominators

What is the final form of the fraction after simplification?

• 17th over twenty

• 20th over seventeen

• 17 over 5

• 5 over 17