Video: Solving Word Problems Requiring Addition of Three Whole Numbers Whose Sum Is Less Than 20

In a zoo, there are 6 lions, 3 elephants, and 7 monkeys. Which addition sentence matches this story? How many animals are there?

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Video Transcript

In a zoo, there are six lions, three elephants, and seven monkeys. Which addition sentence matches this story, six plus three plus the missing number equals seven, six plus three plus seven equals the missing number, or the missing number plus three plus seven equals six? How many animals are there?

The question tells us there are six lions plus three elephants plus seven monkeys. So this is the addition sentence which matches the story. To find the total number of animals, we need to add six plus three plus seven. Three plus seven makes 10. Six plus 10 makes 16. There are 16 animals altogether.

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