Turn the wrong equation 1-1=4 into correct | Matchstick Puzzle

Turn the wrong equation 1-1=4 into correct | Matchstick Puzzle

I was completely stumped by this last puzzle , but maybe you've already figured it out ? Please share your knowledge in the comments below !

You will see answer of these puzzles :-

1) Matchstick puzzle 1+9=2
2) Matchstick puzzle 2-4=2
3) Matchstick puzzle 4-4=7
4) Matchstick puzzle 7+1=3
5) Matchstick puzzle 1-1=4
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