Question

The product is 80. One factor is 4. What is the unknown number

Answer 1

The answer to the question is 20.

Answer 2

20 is the unknown number because 80÷4=20 ,but also here is a way to figure it out you have to figure out what your basic fact is which is 8×4=2,then you add your 0,lastly your answer should be 20.