Reward Points
You earn points by engaging in sessions or answering questions. These points will give you a discount next time you pay for a class.
Lesson Plan: Estimating Sums of Three-Digit Numbers: Rounding Mathematics • Second Year of Primary School
This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to use different strategies to estimate the sum of two three-digit numbers.
Objectives
Students will be able to
- identify the digit with the highest place value in a three-digit number,
- round three-digit addends to the highest place value,
- estimate the sum of three-digit numbers by rounding to the nearest ten or hundred,
- estimate the sum of three-digit numbers by rounding to the highest place value,
- compare the accuracy of different estimates.
Prerequisites
Students should already be familiar with
- the place values of three-digit numbers,
- using column addition to find the sum of two-digit or three-digit numbers,
- rounding three-digit numbers to the nearest ten or hundred.
Exclusions
Students will not cover
- estimating the sum of four-digit numbers.
