1. Rewrite the sum of 24 and 40 by factoring out the greatest common factor.
24 + 40 = _(_+_)
2. Rewrite the sum of 30 and 40 by factoring out the greatest common factor,
30 + 40 = _(_+_)
3. Rewrite the sum of 30 and 42 by factoring out the greatest common factor.
30 + 42 = _(_+_)
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