Question

....how to plus4+5+6 ????​

Answer 1

$4 + 5 + 6 \\(1 + 1 + 1 + 1) + (1 + 1 + 1 + 1 + 1) + (1 + 1 + 1 + 1 + 1 + 1) \\ = 15$

Answer 2

Answer:

you could plus it by your hand,pen and your brain.

ok I will help you 4+5+6=15.

I hope it will help you, please mark brainliest.☺️