WEBVTT
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Hannah made three numbers with place value cards.
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20 plus eight is 28, 50 plus two is 52, and 50 plus seven is 57.
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Pick the correct number sentences.
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Remember, to compare 28 and 52, we compare the tens digit.
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Is 28 equal to 52, less than 52, or greater than 52?
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57 and 52 have the same tens digit.
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Compare the ones digit to find the correct number sentence.
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57 is less than 52, equal to 52, or greater than 52.
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Which is the greatest number that she made?
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This is a three-part question.
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In the first part of the question, we need to compare the numbers 28 and 52.
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We’re told how to do this.
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By comparing the tens digits.
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And if we look closely at the place value cards, we can see that 28 has two 10s and 52 has five 10s.
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We know that five is more than two, so 52 must be greater than 28 because 50, or five 10s, is greater than 20 which is two 10s.
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So 28 is less than 52.
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In the second part of the question, we have to compare the numbers 57 and 52.
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And we’re told to do this by comparing the ones digit.
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This is because 57 and 52 both have the same number of 10s.
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They both have five 10s.
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Let’s compare the ones.
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52 has two ones.
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57 has seven ones.
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And we know that seven is greater than two, so we can say that 57 is greater than 52.
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So which is the greatest number that Hannah made?
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It’s the number 57.
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57 has five 10s and seven ones; 28 only has two 10s.
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And although 52 has five 10s, it only has two ones.
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57 has the most 10s and ones.