ISEE Middle Level Math : How to add fractions

Example Questions

Example Question #206 : Fractions

Add:

Possible Answers:

Correct answer:

Explanation:

Rewrite the fractions with the common denominator , and add numerators:

Example Question #207 : Fractions

Evaluate:

Possible Answers:

Correct answer:

Explanation:

The least common denominator of the three fractions is , so write each fraction in terms of this denominator:

By order of operations, subtract, then add:

,

which is the correct result.

Example Question #208 : Fractions

Add:

Possible Answers:

Correct answer:

Explanation:

Rewrite each fraction with the least common denominator, which is :

We can add vertically, adding the fractions and the whole numbers:

Example Question #209 : Fractions

Add:

Possible Answers:

Correct answer:

Explanation:

Rewrite using the least common denominator, which is ; then add numerators:

Example Question #210 : Fractions

Evaluate:

Possible Answers:

Correct answer:

Explanation:

Rewrite each as an improper fraction, then as a fraction in terms of the least common denominator, which is :

Rewrite the expression, evaluate it, and rewrite the result as a mixed number:

Example Question #411 : Concepts

Find the sum:

Possible Answers:

Correct answer:

Explanation:

Since the denominators of the two fractions are the same, we can simply add the numerators:

Example Question #411 : Concepts

Find the sum:

Possible Answers:

Correct answer:

Explanation:

Since the denominators of the two fractions are the same, we can simply add the numerators:

Example Question #413 : Concepts

Find the sum:

Possible Answers:

Correct answer:

Explanation:

Since the denominators of the two fractions are the same, we can simply add the numerators:

Example Question #414 : Concepts

Solve:

Possible Answers:

Correct answer:

Explanation:

Find the least common denominator between  and . In this case, it is .

Example Question #311 : Fractions

Possible Answers:

Correct answer:

Explanation:

Add the numerators and keep the denominator:

Answer: