1+ 1 1+ 1 1 1= 12

1+ 1 1+ 1 1 1=4

Two is five matchsticks, and four is four matchsticks. Move a matchstick to make the equation hold.

explain

1+ 1 1+ 1 1 1= 12

-& gt； & gt& gt 1+ 1- 1+ 1 1= 12

1+ 1 1+ 1 1 1=4

-& gt； & gt& gt 1+ 1+ 1+ 1=4

Move one of 1 1 to which one of11is formed.

Two questions

The following categories are all made of matchsticks, and none of them are effective. Please move a matchstick in each category to make them effective.

7-4= 12

explain

If 2 of 7-4= 12 looks like a "z", you can take out "1" of 7-4= 12 and put it under "2" to become a "3".

7-4=3