POSSIBLE SOLUTIONS:

NOTE: You may come up with different solutions than those that follow. If so, please post them in the comments. Thanks!

PUZZLE #1: In the left part of the equation, connect the top and left ends of the first plus sign to make it a 4.
Then the equation reads 545 + 1 = 546. (Alternately, use this tactic on the second plus sign, making the equation read 5 + 541 = 546.)

PUZZLE #2: In the right side of the equation, remove the line connecting the top and left ends of the 4 to turn it into a plus sign.
Then the equation reads 5 + 5 + 1 = 5 + 6.

PUZZLE #3: In the left side of the equation, remove the vertical bar from the second plus sign and move it to the right side of the equation, using it to form a division sign between the 54 and the 6. Then the equation reads 5 + 5 – 1 = 54 / 6.

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