First way, turn the six into a zero.
Second way use a match from the six to turn it to a five, and add it to the final four to make it a nine.
Third way ... 8 - 4 = 4
First way, turn the six into a zero.
Second way use a match from the six to turn it to a five, and add it to the final four to make it a nine.
Third way ... 8 - 4 = 4