Rewrite a sum of two numbers to 100 using the GCF
Pull out the greatest common factor, then write the two leftover numbers in brackets. Use spaces: GCF(first + second).
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Use the GCF to rewrite 6 + 2 as a product: GCF(sum of two numbers with no common factor).
Answer: 2(3 + 1)
Rewrite 4 + 20 as the GCF times a sum, like 4(9 + 2).
Answer: 4(1 + 5)
Rewrite 6 + 3 as the GCF times a sum, like 4(9 + 2).
Answer: 3(2 + 1)
Tip: Pull out the greatest common factor, then write the two leftover numbers in brackets. Use spaces: GCF(first + second).
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