Adding and Subtracting Fractions

Mr. Ada introduces fractions using sandwich examples, explaining how to add fractions with like denominators and the issues with unlike denominators. He outlines rules for adding and subtracting fractions, emphasizing the importance of like denominators. The video also demonstrates using number lines for visualizing fraction addition and concludes with examples of subtracting fractions.

What happens when you add two fractions with the same denominators?

• The fractions cannot be added.

• Both numerators and denominators are added.

• The numerators are added, and the denominator stays the same.

• The denominators are added together.

Why can't fractions with different denominators be directly added?

• Because fractions cannot be added at all.

• Because the denominators need to be the same.

• Because the result would be smaller than the original fractions.

• Because the numerators are different.

When adding fractions with like denominators, what should you do with the numerators?

• Add them.

• Subtract them.

• Multiply them.

• Divide them.

On a number line divided into eighths, what is the result of adding 3/8 and 4/8?

• 7/8

• 8/8

• 1/8

• 6/8

What is the result of adding 2/5 and 1/5?

• 1/5

• 5/5

• 2/5

• 3/5

What is the rule for subtracting fractions with like denominators?

• Fractions cannot be subtracted.

• Subtract both numerators and denominators.

• Subtract the numerators and keep the denominators the same.

• Subtract the denominators and keep the numerators the same.

What is the result of subtracting 4/7 from 11/12?

• 8/12

• 7/12

• 3/12

• 5/12