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- [Instructor] We're told,
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the table gives the amounts
of materials Aya recycled.
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So we have the different materials here,
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and then it gives the various amounts.
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How many kilograms of paper
and aluminum did Aya recycle?
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So pause this video and see
if you can figure this out.
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Okay, so we're thinking
about paper and aluminum,
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so paper is right over here.
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She recycled 277 kilograms of paper.
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And aluminum is right over here.
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She recycled 134 kilograms of aluminum.
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And so we want the
combination, or the sum,
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of paper and aluminum, so it's going to be
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277 kilograms plus 134 kilograms.
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So we really need to figure
out what 277 plus 134 is,
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and in multiple videos, we have talked
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about how there's many different
ways of approaching this.
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We could say, well let's
just break up the 134.
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We could start at, actually let
me do this on a number line.
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That sometimes is a fun thing to do.
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So if we were to just say,
this is our number line,
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and we're going to start
at 277 right over there.
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So first, we could add
100, because we have 100
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right over there, so let's do that.
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If we add 100, so plus
100, where does it get us?
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Well if we add 100 here, we get to 377.
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So 300, I'll just write, 77.
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And then we could add three 10s, or 30.
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So then we're going to add 30.
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So let's add 30, so plus 30.
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What does that get us?
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So this is interesting.
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If you add 30 to 370,
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you would get to 400,
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and then we have another seven there,
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so that gets us to 407.
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So then we get to 407.
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And once again, this is just one way
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to try to think about it.
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And then, last but not
least, we could add the four.
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So then you say, we're there right now,
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and then we add plus four,
and seven plus four is 11,
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so 407 plus four is 411.
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So how many kilograms of paper
and aluminum did Aya recycle?
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Would be 411 kilograms.
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Kilo, kilograms, and we're done.