WEBVTT
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When we add three numbers, we can first add any two of them.
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Eight plus six plus seven equals 14 plus seven.
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Now can you find the missing number?
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Four plus seven plus five equals what plus five.
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To find the missing number, we need to add together four and seven.
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Four and seven is 11.
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The missing number is 11.
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Four plus seven plus five is equal to 11 plus five.
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We can add the four and seven together first to make 11 and then add five.
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The missing number is 11.