The GCF of 12 and 20 is 4.
The distributive property states that 12 x 20 = 10 x 20 + 2 x 20 = 200 + 40 = 240
4(3 + 5)
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You need at least two numbers to find a GCF.
The GCF of 24 and 30 is 6. The distributive property states that 24 x 30 = (20 x 30) + (4 x 30)
The GCF of 20 and 35 is 5. (4 x 5) + (7 x 5) = 11 x 5 = 55
40 + 44 = (4 x 10) + (4 x 11) = 4 x 21 = 84
The GCF of 20 and 35 is 5. That makes 20 + 35 (4 x 5) + (7 x 5) = 11 x 5, a needlessly complicated way of saying that 20 + 35 = 55