Two Thirds Minus One Fourth: Author's Purpose

Read about subtracting fractions with different denominators, then work out why the author wrote it.

Story Brief #403

Subtracting fractions with different denominators is a process that requires finding a common denominator.

🎯 Your mission

Read carefully. Then prove you understood.

⚡ The twist

Slow down. The first answer that pops up isn't always the right one.

📖 1 of 2

Subtracting fractions with different denominators is a process that requires finding a common denominator. A denominator is the bottom number of a fraction, and it tells us how many equal parts something is divided into. For example, to subtract 1/4 from 2/3, we first find a common denominator. The smallest common denominator for 4 and 3 is 12.

📖 2 of 2

We can convert the fractions: 1/4 becomes 3/12 and 2/3 becomes 8/12. Now we can subtract: 8/12 - 3/12 = 5/12. So, 2/3 - 1/4 equals 5/12!

Question 1

1 of 2

Why did the author most likely write this passage?

How sure are you going to be?😐 maybe

Question 2

2 of 2

Authors use examples to explain their ideas. Which sentence from the passage gives an example?

How sure are you going to be?😐 maybe

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You got 0 of 2 right.

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Two Thirds Minus One Fourth: Author's Purpose

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