Save vs. spare

[Mimi]

Test No. errors/inter-1 "Save money now", question 1

He is very careful with his money and spares at least a quarter of his pay every month.

(a) careful
(b) spares
(c) a quarter
(d) pay

Test No. errors/inter-1 "Save money now", answer 1

He is very careful with his money and saves at least a quarter of his pay every month.

Correct entry: saves
The error was: (b) spares

You have not found the error.
He is very careful with his money and spares at least a quarter of his payment every month.
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Could you tell me the different between "save" and "spare".
Best regards,

[Alan]

Save means put money aside for the future. Spare means give a sum of money that you can afford to offer someone. Take this sentence: I have saved a lot of money this year from my pay and I can spare you (am able to give you) ?100 if that will help.
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English as a Second Language
You can read my ESL story Are you a Persuader?