Video

Telling time with number line (Full video)

Khan Academy
Supporting grades: 3

Description: Sal uses a number line to tell time and find the duration of an event. Andrey starts working on his science project at 4 o'clock pm, and he finishes 50 minutes later. Which number line below has a red dot marking when Andrey finishes working on his science project? This first choice over here, puts the dot at 4 o'clock, but they didn't say when did he start working on his science project, they say put a red dot marking when Andrey finishes working on his science project.

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