Commutative Property:
5 x 4 = 4 x 5
20 = 20
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I don't. I learned the 18 times table at school - around 50 years ago - and still recall it.
No it is not a zero property because it doesn't use a zero. It is an example of the commutative property of multiplication.
Each and every one - even though there may be times when it is not explicit.
None whatsoever. You might find the distributive property useful when trying to calculate 39*74. Of course, if you are familiar with the 39 times table or the 74 times table, the distributive property is a complete waste of time! But somehow I doubt that level of arithmetic competence.
Use a ruler, to find out the area do width times length.