Not sure what "would not work" in this case. The corresponding commutative property states that 5x4 is the same as 4x5.
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having the property that one term operating on a second is equal to the second operating on the first, as an example: 4x5=5x4 or 5x4=4x5 RATE MY ANSWER THE BESTEST OF ALL!!!!
2X10 would work, as would 5X4.
20
no. 6x8 =48. 5x4 + 1x4 =20 + 4 =24.
5x4 - 2x = x*(5x3 - 2) and that cannot be factorised further without invoking surds.