Compatible Numbers for Division

What are compatible numbers?

What is the purpose of rounding numbers in division?

What is the divisor in the division problem $$638 \, \div \, 76$$ ?

What is the divisor rounded to the nearest ten in $$638 \, \div \, 76$$ ?

Choose a compatible number for 90.

What is the estimated quotient of $$4,200 \, \div \, 60$$ ?

If you want to estimate $$322 \, \div \, 53$$ , which number should you change first?

What is the best equation to estimate the quotient of $$322 \, \div \, 53$$ ?

How do you round 76 to the nearest ten?

What is the compatible number for 90 that is closest to 1,800?