Q:

# How do you estimate?

A:

To estimate a number in math, round the last digit of a number up or down to the nearest zero number. This is sometimes referred to as the nearest 10.

## Keep Learning

An example of estimating would be 123 + 16. If the last number is less than five, then round down to a zero number, in this case 120. If the last number is five or greater than five, then round to the higher zero, in this case 20. Therefore, the problem would become 120 + 20 = 140. Estimation is commonly used in multiplication, division, algebra and other mathematical disciplines.

Sources:

## Related Questions

• A: The divisibility rule for 7 dictates that a number is divisible by 7 if subtracting 2 times the digit in the one's column from the rest of the number, now ... Full Answer >
Filed Under:
• A: When rounding a whole number, it is important to identify first the digit being rounded with its place value, such as tens, or hundreds. Once the rounding ... Full Answer >
Filed Under:
• A: The value of an underlined digit in a given number expresses how much that digit is worth. To determine the digit’s value, multiply it by its place value. ... Full Answer >
Filed Under:
• A: To perform partial product multiplication, you use the distributive property of numbers, multiplying each digit of a number by each digit of the other numb... Full Answer >
Filed Under:
PEOPLE SEARCH FOR