Question 1

Which of the following is the correct first step when adding the fractions $$\frac{3}{8}$$ and $$\frac{1}{4}$$?

Accepted Answer

Find the least common denominator (LCD) of 8 and 4.

Question 2

What is the sum of $$\frac{2}{5}$$ and $$\frac{1}{10}$$? Simplify your answer.

Accepted Answer

Question 3

Which of the following best describes the Least Common Denominator (LCD)?

Accepted Answer

The smallest whole number that is exactly divisible by each denominator of the fractions.

Question 4

What is the correct procedure to add $$\frac{3}{7}$$ and $$\frac{2}{5}$$?

Accepted Answer

Find the LCD, convert both fractions to equivalent fractions with the LCD, add the numerators, and simplify.

Question 5

If you want to add $$\frac{5}{12}$$ and $$\frac{1}{8}$$, what is the LCD?

Accepted Answer

$$24$$

Question 6

Which of the following is the correct sum of $$\frac{3}{4} + \frac{1}{4}$$?

Accepted Answer

$$\frac{4}{4}$$

Question 7

A recipe calls for $$\frac{2}{3}$$ cup of sugar and $$\frac{1}{6}$$ cup of honey. How much sweetener is used in total?

Accepted Answer

$$\frac{5}{6}$$ cup

Question 8

Which step is NOT part of the procedure for adding fractions with common denominators?

Accepted Answer

Multiply the denominators together.

Question 9

What is the result of subtracting $$\frac{5}{9}$$ from $$\frac{7}{9}$$?

Accepted Answer

$$\frac{2}{9}$$

Question 10

Which of the following is the correct way to add $$1\frac{1}{2}$$ and $$2\frac{2}{3}$$?

Accepted Answer

Convert both to improper fractions, add, and simplify.

Question 11

What is the sum of $$1\frac{1}{4} + 2\frac{2}{4}$$?

Accepted Answer

$$3\frac{3}{4}$$

Question 12

Which of the following is a correct step when adding or subtracting mixed numbers?

Accepted Answer

Change the mixed number into an improper fraction first.

Question 13

If you subtract $$\frac{3}{8}$$ from $$1$$, what is the result?

Accepted Answer

$$\frac{5}{8}$$

Question 14

Which of the following is the correct LCD for $$\frac{1}{6}$$ and $$\frac{1}{8}$$?

Accepted Answer

$$24$$

Question 15

A medication is prescribed as $$\frac{3}{5} of a $$tablet in the morning and $$\frac{2}{3} of a $$tablet in the evening. How much medication is taken in total per day?

Accepted Answer

$$\frac{19}{15}$$ tablets

Question 16

Which of the following is NOT a correct step in finding the LCD using prime factors?

Accepted Answer

Add all the denominators together.

Prealgebra Review: Adding and Subtracting Fractions

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