What is (3×10) ×8= ------ × (10×8) elementary 5th grade
This is an example of the commutative property of multiplication.
That property states: \((a \times b) \times c = a \times (b \times c)\)
So using that property, we can figure out that 3 should be in the blank.
Using the property \((a\times b) \times c = a \times (b\times c)\), we know that 3 is the missing number.