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Which number is 100 less than 600?
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When we hear the phrase less than, we need to think subtraction because we’re taking something away.
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Because we are talking about 100 less than, we need to subtract 100.
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Starting with 600 minus 100, 600 take away 100 is 500.
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Six minus one is five.
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Therefore, 600 minus 100 equals 500.