When a supply shipment was delayed, Dr. Dino asked Emek and Luna to manage the laboratory's remaining dinosaur food. They combined 5/12 of a container from one shelf with 4/12 from another to make 9/12 of a container. After serving 3/12 to the hatchlings, 6/12 of the container remained. Because every fraction had the same denominator, they checked the calculations quickly and confirmed the food reserve would last until the new supplies arrived.
Challenges
Challenge 1 of 5
Challenges
Challenge 1 of 4
Hint
When fractions have the same denominator, keep the denominator and add only the numerators.
A student says that 5/12 + 4/12 = 9/24 because both denominators should be added. Which statement is correct?
The student is correct because both numerators and denominators should be added.The student is incorrect because only the numerators are added when the denominators are the same, so the sum is 9/12.The student is incorrect because the answer is 1/12.The student is correct because 9/24 is equal to 9/12.Correct! The denominator stays 12, so 5/12 + 4/12 = 9/12.
Try again. Review how to add fractions with the same denominator.
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Hint
First combine the fractions, then subtract the amount served.
After combining 5/12 and 4/12, Emek and Luna served 3/12. What is the numerator of the fraction that remained?
Correct! The remaining fraction is 6/12.
Try again. Calculate 9/12 − 3/12.
Next🎉 Congrats! You got this question!
Hint
Subtract the numerators and keep the denominator the same.
Dr. Dino says, "After serving 3/12 from 9/12, only 5/12 remains." Is Dr. Dino correct?
Yes, because 9 − 3 = 5.No, because 9/12 − 3/12 = 7/12.No, because 9/12 − 3/12 = 6/12.Yes, because the denominator changes to 9.Correct! 9/12 − 3/12 = 6/12.
Try again. Subtract the fractions using the common denominator.
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