Question

What is (3×10) ×8= ------ × (10×8) elementary 5th grade

Answer 1

Using the property
`(a* b) * c = a * (b* c)`, we know that 3 is the missing number.

Answer 2

This is an example of the commutative property of multiplication.

That property states:
`(a * b) * c = a * (b * c)`

So using that property, we can figure out that 3 should be in the blank.