2sable, 6 bytes

`Ÿ5¢_O

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Explanation

`Ÿ # inclusive range
 5¢ # count 5's in each element of the range
 _ # negate
 O # sum

Note: This works due to a bug in ¢ making the function apply itself to each element instead of counting matching elements in the list.

2sable, (削除) 6 (削除ここまで) 5 bytes

Saved a byte thanks to Adnan

Ÿ5¢_O

Try it online!

Explanation

 Ÿ # inclusive range
 5¢ # count 5's in each element of the range
 _ # negate
 O # sum

Note: This works due to a bug in ¢ making the function apply itself to each element instead of counting matching elements in the list.

2sable, 6 bytes

`Ÿ5¢_O

Try it online!

Explanation

`Ÿ # inclusive range
 5¢ # count 5's in each element of the range
 _ # negate
 O # sum

2sable, 6 bytes

`Ÿ5¢_O

Try it online!

Explanation

`Ÿ # inclusive range
 5¢ # count 5's in each element of the range
 _ # negate
 O # sum

Note: This works due to a bug in ¢ making the function apply itself to each element instead of counting matching elements in the list.