Question

I have come up with 3 different answers to this basic math problem...20, 128, 320...
4x4+4x4+4-4x4

Answer 1

4x4+4x4+4-4x4
16+16+4-16
20

Answer 2

So, what do u think?

Answer 3

put brackets to help you out.
\[(4*4)+(4*4)+4-(4x4)\] Now use BEDMAS (Brackets, exponents, division, multiplication, addition, subtraction).
Do all multiplication first.
\[16+16+4-16\]Do all addition
\[36-16\]Now do subtraction
\[20\]