Estimating the difference of 5 digit numbers

In a subtraction problem, what is the term for the number from which another number is subtracted?

• Minuend

• Subtrahend

• Difference

• Product

When rounding a number to the highest place value, if the digit to the right of the highest place value is 0, 1, 2, 3, or 4, what action should be taken?

• Round up (add 1)

• Round down (retain)

• Multiply by 10

• Divide by 10

A bookstore had 73,845 books. After a sale, 28,430 books were sold. About how many books are left in the bookstore, estimated by rounding to the highest place value?

• 40,000

• 50,000

• 30,000

• 60,000

Estimate the difference of 92,345 - 23,456 by rounding each number to its highest place value.

• 60,000

• 70,000

• 80,000

• 50,000

Estimate the sum of 76,321 + 18,742 by rounding each number to its highest place value.

• 90,000

• 100,000

• 80,000

• 110,000