WEBVTT
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Find the total by first adding the hundreds.
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265 plus 300 equals what?
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This question asks us to find the total.
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We know this means we need to add together the numbers to find the answer.
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We need to add together 265 and 300.
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Now, we know that the number 265 is made up of two hundreds, six tens, and five ones.
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And the number that we’re adding to 265 is 300, which is simply three hundreds.
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There are no tens and no ones.
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Because all we’re doing is adding a number of hundreds, the question tells us that we can find the total by first just adding the hundreds.
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So, let’s partition our number 265, so that we’re just looking at the hundreds.
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We’ll move our two hundreds over here.
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There we go.
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On the left-hand side, instead of 265, we’re now left with just 65.
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And on the right-hand side, we’ve got 200.
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We’ve broken apart 265 into 65 and 200.
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And the reason we’ve done this is to make it easier to add the hundreds.
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Let’s do what the question says now then and first add the hundreds together.
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We have two hundreds, and we need to add another three hundreds.
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100, 200, 300.
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We started with 200.
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We added 300.
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And, now we have 500.
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So, the two parts to our answer are 65, you can see this part of the number hasn’t changed at all, and also 500.
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This is the total of our two hundreds plus three hundreds.
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To find the overall total, we need to combine both parts back together.
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What is 65 plus 500?
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The answer is 565.
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Because we were adding a number of hundreds to a three-digit number, we knew that we could partition the three-digit number and start by adding the hundreds together.
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265 plus 300 equals 565.