WEBVTT
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Nine children want to play a game.
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They need to be in teams of two.
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Find out how many teams of two there will be and whether any student would be left out.
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Let’s draw a picture to represent this scenario.
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Okay, so here are our nine players.
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And they need to be put in teams of two.
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There’s team one, team two, team three, and team four.
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But this player doesn’t have another person to play with him.
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He is left out.
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In this case, we have four teams and one left out.
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That’s how you would solve this problem, by drawing a picture.
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But what if there were 87 children?
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You wouldn’t wanna draw a picture of 87 children.
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So maybe we need another strategy to solve this problem.
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Putting the students in groups of two is the same thing as dividing nine by two.
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To divide nine by two, I need to think of numbers that are multiplied by two that are close to nine.
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Two times some number is about nine.
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We’re close to nine.
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Two times four is eight.
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And that’s pretty close to nine.
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Two times four equals eight plus one equals nine.
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There will be four teams and one remaining, one left out.