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Table of Contents
In this lesson, you’ll get a lesson plan with time allocations, theory with examples, practice exercises, exercises for independent learning, game and extension activities.
See the fact file below for more information on subtraction within 1000 or alternatively, you can download our 27-page Number and Operations in Base 10: Subtraction within 1000 worksheet pack to utilise within the classroom or home environment.
Key Facts & Information
Learning Objective
At the end of the lesson, the student will subtract within 1000 by understanding that in subtracting three-digit numbers, one subtracts hundreds and hundreds, tens and tens, ones and ones.
A Note for the Teacher
When subtracting within 1000, take note of the following:
- You are dealing with up to three-digit numbers
- Decompose the numbers into hundreds, tens, and ones
- Remember that subtracting means having a value that is less than the minuend
- Vertically, always start subtracting from the ones, then tens, then hundreds
Theory
When subtracting numbers within 1000, we can simply decompose the numbers and subtract them by place values.
- Consider 862 – 271:
First, decompose 862 and 271 into place values.- 862 = 8 hundreds + 6 tens + 2 ones = 800 + 50 + 2
- 271 = 2 hundreds + 7 tens + 1 ones = 200 + 70 + 1
- Next, subtract the hundreds place.
- 800 – 200 = 600
- Then, subtract the tens place.
- 60 – 70 cannot be, so you borrow 100 from the answer in the hundreds place, which is 600. So, we are left with 5 hundreds or 500.
- So, it will become 160 – 70 = 90
- Then, subtract the ones place and add all the differences together.
- 2 – 1 = 1
- 500 + 90 + 1 = 591
- We can also solve it vertically:
Next,
Next,
Lastly,
Number and Operations in Base 10: Subtraction within 1000 Worksheets
This is a fantastic bundle that includes everything you need to know about Number and Operations in Base 10: Subtraction within 1000 27 in-depth pages. These are ready-to-use worksheets that align with the Common Core code 2.NBT.7(2) for Subtraction within 1000.
Complete List of Included Worksheets
- A lesson plan
- Warm-up activity
- Math theory explained
- Assisted learning activities
- Independent learning activities
- Extension activities and games
- Answer keys
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Use With Any Curriculum
These worksheets have been specifically designed for use with any international curriculum. You can use these worksheets as-is, or edit them using Google Slides to make them more specific to your own student ability levels and curriculum standards.