Fractions: Subtraction and Addition Techniques

The video tutorial explains a shortcut method for adding and subtracting fractions using cross-multiplication. It demonstrates the process step-by-step, first for subtraction and then for addition, highlighting the importance of multiplying straight across for the denominator. The tutorial concludes with a note on simplifying fractions if necessary.

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

• Cross multiply the numerators

• Add the numerators

• Cross multiply the denominators

• Multiply the numerators directly

Tags

CCSS.7.NS.A.1C

After cross multiplying in the subtraction method, what should you do next?

• Divide the results

• Add the results

• Multiply the results

• Subtract the results

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

In the addition of fractions using the shortcut method, what operation is performed after cross multiplying?

• Subtract the results

• Multiply the results

• Divide the results

• Add the results

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the final step in both the addition and subtraction methods for fractions?

• Subtract the denominators

• Add the denominators

• Multiply the denominators

• Multiply the numerators

Why is it important to simplify fractions after performing operations?

• To make them easier to add

• To change their denominators

• To ensure they are in their lowest form

• To make them easier to subtract