Key takeaway
Square units inside
Before you read
Test yourself first: 5 questions
Question 1 of 5
Add: 3/4 + 1/8
Answer: B. Use a common denominator of 8: 3/4 = 6/8, so 6/8 + 1/8 = 7/8.
Question 2 of 5
What is 1/2 + 1/3?
Answer: B. Common denominator 6: 3/6 + 2/6 = 5/6.
Question 3 of 5
What is the greatest common factor (GCF) of 12 and 18?
Answer: B. The largest factor shared by 12 and 18 is 6.
Question 4 of 5
What is 3/5 + 1/5?
Answer: B. With a common denominator, add the numerators: 3/5 + 1/5 = 4/5.
Question 5 of 5
What is 7/8 − 3/8?
Answer: A. Subtract the numerators over the common denominator: 7/8 − 3/8 = 4/8 = 1/2.
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