WEBVTT
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Michael used place value blocks to show how to add 425 and 369.
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What is the sum?
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In our addition problem, in the ones place, we have five plus nine.
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Let’s look at the ones blocks to find out what Michael did.
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Michael realised that there were more than 10 ones blocks.
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So he counted up 10 of the ones blocks and moved them into the tens place instead.
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10 ones were equal to one 10.
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We no longer need those 10 ones in the ones place because we’re using a block of 10 instead.
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We now count the remaining ones blocks.
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There are four ones and so we write a four in the ones place.
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And then, we put an additional one in the tens place to represent the new tens block we’ve just created.
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Now that we’ve finished adding up all the ones, we can move on to the tens place.
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Let’s count the number of tens blocks in the tens place.
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We have the one we carried over plus two plus six.
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Altogether there are nine 10 blocks.
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So we can write a nine in the tens place.
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Our last step is to add the number of hundreds blocks we have.
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Four hundreds blocks plus three hundreds blocks equals a total of seven.
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Four plus three equals seven.
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By using value blocks we’ve added 425 plus 369 together to equal 794.
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The sum is 794.