accurately

"a defect in the ear or eye; a defect in timber or iron; a defect of memory or judgment"

"accurate knowledge"

"The farmer's math of the hay field was impressive—he collected a large amount. "

"It looks weaker and weaker, the more I think about it."

"I always try to express myself precisely."

"He is a student of life."

"What is your question?"

"The student's answer contained several errors. "

"My sister learned to write in a very careful manner. "

"He answered the question."

"He divided the coins exactly in half."

"The school is located just outside the town, without the main shopping area. "