The extra room proved very useful when we had visitors.
My wife's part-time job brings in a little extra money.
Having a few extra batteries handy is never a bad idea.
You must cut down on extra expenses in order to live within your means.
In countries with electoral colleges, citizens vote for representatives to pick heads of state for them, adding an extra layer to what would otherwise be a direct election.
When a holiday falls on Sunday, we have an extra holiday on Monday.
The result of this experiment is obscured by the extra variables added in the formula.
I looked at my bank account book, and happily discovered that I had an extra $50!
My total income is far short of 300,000 yen a month, inclusive of extra earnings.
Were you just pulling my leg when you said we were all going to get extra bonuses?
Extra special treatment is imperative to get the vessel through government red tape, so that she can leave port on time.
In reply to your request, we offer you an extra discount of 5% on this order.
Peter gets paid £50 a day working as an extra.
An air conditioner is available as an optional extra.