Question

1. we had a $10 coupon, so the clerk needed to ______ $10 from the total amount we owed at the grocery store.

Explanation:

The sentence is about a $10 coupon being used at a grocery store, so the clerk needs to subtract $10 from the total amount owed. The appropriate verb here is "subtract" as it means to take away or deduct a quantity from a total.

Answer:

subtract