Number and operations
3.4(B)Rounding to Estimate Sums
Round to the nearest 10 or 100 or use compatible numbers to estimate solutions to addition and subtraction problems.
Part of The student applies mathematical process standards to develop and use strategies and methods for whole number computations in order to solve problems with efficiency and accuracy
Read the lesson
Intro
Making a Smart Guess
Today you will learn to round numbers and make a smart guess about adding or subtracting. Sometimes you do not need an exact answer. You just need a close answer. A close answer is called an estimate. Estimating helps you check your work fast.
Sign in to ask the tutor
Reading the lesson is free for everyone. Asking the AI tutor needs a family account.
Sign in to ask the tutorCreate a family account