Video: Using Repeated Addition to Count Objects in an Array

Hannah is counting the cars in a parking lot. Find the missing number in her answer. How many cars are there?

01:50

Video Transcript

Hannah is counting the cars in a parking lot. There are two plus two plus two plus what cars. Find the missing number in her answer. How many cars are there?

First, we need to find the missing number in Hannah’s sum, two plus two plus two plus what. Once we found the missing number, we can then find the total number of cars. Hannah said that two plus two plus another two plus what. Hannah is counting the cars in 2s. So the missing number is two. Hannah counted four lots of two.

How many cars are there altogether. To find the answer, we can count in twos, two, four, six, eight. The missing number in Hannah’s answer was number two. Hannah was counting the cars in 2s, two plus two plus two plus two. Once we knew that Hannah was counting the cars in 2s, we counted in 2s to find out how many cars there are altogether. Two, four, six, eight. Two plus two plus two plus two equals eight.

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