Interchangeable signs

2+2 = 2×2 = 4
1+2+3 = 1x2x3 = 6
What set of four numbers works and what three sets of five numbers?

Reveal solution

Four numbers: 1,1,2,4
Five numbers: 1,1,1,3,3; ,1,1,2,2,2; 1,1,1,2,5