Grades 1-2 Video Solutions 2023-2023_1-2

Video Transcription

Problem number 23. Three frogs live in a pond. Each night, one of the frogs sings a song to the other two. After nine nights, one of the frogs had sung two times.  Another frog had listened to five songs. How many songs had the third frog listened to?  To solve this problem, we're going to make a chart. We have frog one, frog two, and frog three.  And on each of the nine nights, each frog either sang or listened.  And the sang and listened numbers have to add up to nine.  The first statement says that one of the frogs had sung two times. So frog one sang two times, which means that this frog listened seven times. Another frog listened to five songs.  So for five nights, this frog listened, which means it sang four times. Now between frog one and frog two, two plus four or six nights are covered for the songs.  So the last frog sang three times  so that there are nine songs total.  Now this frog sang three times. The frog listened six times because three plus six is nine. So the answer is B, six.

Video Summary

In the problem, three frogs take turns singing over nine nights. One frog sings twice and listens seven times, and another listens to five songs, singing four times. With these accounted, the remaining frog must sing three times. Since this frog sings three times, it listens six times (because the total must add up to nine). Therefore, the third frog listens to six songs. The process involves distributing singing duties across the frogs to ensure the numbers add to nine, ultimately revealing that the third frog listened to six songs. The answer is B, six.

Keywords

frogs

singing

nights

distribution

songs