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In the video it demonstrates adding 8 + 7 using a visual approach. Adding emphasizes the concept of place value, showing that 15 is made up of 1 group of 10 and 5 ones. This method helps students understand addition within 20 in a more concrete way. Created by Sal Khan.

## Want to join the conversation?

• What is the importance of Adding?
• Math is a way to analyze complex problems and the world around you. It helps your brain connect pathways and come to quicker solutions by breaking down a problem to its most basic ingredients (first principle thinking). It's only when you're able to break down a problem to its most fundamental components, you're able to see the solution. In math, we do this by using an abstract language (numbers)

Example:
8 + 7
10-8=2
7-2=5
10+5=15
• What does represent mean??
• Represent means what something means. For example, a drawing of something you saw represents what you saw, even though you aren't there anymore. In math, we can represent the numbers with the amount of fruits, or the other way around, representing the amount of fruits with numbers. For example, 2 oranges = 🍊🍊 and 🍊🍊 = 2 oranges. Also, like said in the video, one number can represent more numbers. 15 can mean 10 + 5, since the 0 is basically nothing, yet it is important because it makes the 1 before it 10 times bigger.
• I don't understand how he got 8 tomatoes!! Someone help m,e understand
(1 vote)
• He took the 8 out of the 8+7
(1 vote)
• My teacher teached me this poem more on top? no need to stop! More on the floor? Go next door and get ten more! Numbers the same zeros the game!

That was a subtraction poem and I think it was a good rhyme and also number lines are used for counting like 8 minus 3 start at 8 and go down three
7 6 5 so the answer is five come to me for help
(1 vote)
• Why not just use your fingers?