Triple digit subtraction worksheet: Grade 3 Subtraction Worksheet: Subtracting 3-digit numbers in columns
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Three-Digit Subtraction
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Search Printable Three-Digit Subtraction Worksheets
If your child has mastered our two-digit subtraction questions, check out our three-digit subtraction worksheets. A balanced mix of math and activities, students from grade 2 to grade 4 can subtract while having fun. Use three digit subtraction worksheets to enhance math skills over the summer months or during the school year. Learning opportunities await with our wide array of math and number-themed printables.
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Development of a lesson in mathematics on the topic «Addition and subtraction of three-digit numbers of the form: 261 + 124, 378-162»
Lesson objectives:
- To introduce students to the methods of addition and subtraction of three-digit numbers of the form: 261 + 124, 3 78-162.
- To consolidate knowledge of the composition of numbers from 3 to 20, to consolidate the ability to solve problems and equations, to consolidate the ability to express, add and subtract units of length.
- Develop thinking through model building.
- Develop communicative competence based on the organization of group work.
- to cultivate a sense of collectivism, love for mathematics.
Appendix
Lesson progress
1. Teacher’s word.
— “Today we will visit the country of numbers. And the Firefly will lead us to this country. Interesting challenges await us. At the end of the journey, the Firefly will give us a wonderful picture, fragments of which will open after each stage of the lesson. Look at the lesson plan. What do we do?»
Lesson plan:
- Mental arithmetic. Work in pairs. A task of ingenuity.
- New topic.
A task of ingenuity. - Work in notebooks
- Solution of examples
- Fizminutka.
- Work in a group. Solution of equations.
- Calligraphy.
- Problem solution.
- Independent work by choice.
- Security question.
- Summary of the lesson.
-“We will evaluate each stage of the lesson. You have achievement sheets, and on the board is an achievement screen. Pay attention to how we evaluate our work.
(A sheet with evaluation criteria hangs on the board).
+ without errors
+- 1-2 errors
-+ 3-5 errors
— more than 5 errors
2. Message of the topic of the lesson.
— What are the numbers? ( one-digit, two-digit, three-digit )
— “To learn the topic of the lesson, you need to complete this task. Here are closed words with which we will read the topic of the lesson.
I call 5 students, and the rest will closely monitor the correct completion of the task.
Connect the numbers in ascending order with a line.
|
Express 80 cm =..dm |
|
Represent numbers as bit terms. 634=…s…d….unit |
|
Express 5m2dm6cm=…cm |
|
Calc: 50-29= |
The subject entry appears. Addition and subtraction of three-digit numbers.
— Who can state the purpose of the lesson?
(To get acquainted with the methods of addition and subtraction of three-digit numbers).
— At the end of the lesson, we will answer the security question.
(What rules must be observed when adding and subtracting three-digit numbers).
PICTURE FRAGMENT!
3. Oral counting.
— Let’s consolidate knowledge about the composition of numbers from 3 to 20. We will work in pairs with sorbon. (Check, evaluate)
A task for ingenuity.
Firefly has three left legs, three right legs, three legs on the left side, three legs on the right side. How many legs does a firefly have?
PICTURE FRAGMENT!
4. New topic.
— «Read the expression, naming each component.»
— Model the example 261+124. One student works at the blackboard, the rest of the students at their workplaces.
— “In the number 261 there are 2 hundreds, I lay out 2 large triangles, 6 tens, I lay out 6 small triangles of tens and 1 unit, I put 1 dot. In the number 124 — 1 hundred, I lay out 1 large triangle, 2 tens, I put 2 triangles of a dozen and 4 units, I put 4 points — units.
Add hundreds to hundreds, tens to tens, units to units. I get 3 hundreds, 8 tens and 5 units or 385.
— What rule helped us in solving this expression?
— Work according to the textbook.
P.50 №1
Consider the first model Did we reason correctly? Add an answer. Read what does the second graphic model mean? (134+242) Connect the model with the corresponding example and complete it.
(Letter of comments).
— Try out the latest model yourself.
(Check).
— What rule is important to follow when adding three-digit numbers? When subtracting?
PICTURE FRAGMENT!
5. Solution of examples No. 2
— “Pay attention to how the addition and subtraction components were written in a column?”
Let’s start with addition and subtraction from what digit? We do options. Option 1 1 column, 2 option 2 column.
(Mutual check).
— What knowledge helped you solve these examples?
— Do you guys think this knowledge about adding and subtracting three-digit numbers will be useful to you in the future?
PICTURE FRAGMENT!
6.
Group work. Solution of equations.
— This task was offered to you by a firefly. He has lost his favorite musical instrument, he asks you to find it. The task is to find the root of the equation.
(Picture opens).
— «The length of the magic violin is 1dm 3cm express the length in centimeters.»
PICTURE FRAGMENT!
7. Work in notebooks. Calligraphy.
— Read the numbers. What pattern did you see? Following the rule, write down 2 more three-digit numbers. What rules for writing numbers do you know?
8. Solution of the problem.
Firefly hurried to our lesson. After he ran 2m 4dm 5 cm, he had to run 3m 2dm 1cm. What is the whole path of a firefly?
— What does 2m 4dm 5 cm mean?
— What does 3m 2dm 1 cm mean?
— What is the question of the task?
— Will we be able to answer the problem question right away?
— What do we need to know the whole or the part?
— How to find the whole?
— Write down the solution.
PICTURE FRAGMENT!
9. Independent work by choice.
(Check).
PICTURE FRAGMENT!
10. Security question?
— What rules must be observed when adding and subtracting three-digit numbers?
11. Lesson summary.
— What was your goal during the lesson?
— Have we reached the goal of the lesson?
— Which tasks did you like the most?
— What tasks caused difficulties?
— The lesson is over. Thank you for your cooperation.
Mathematics lesson in grade 3 “Oral addition and subtraction of three-digit numbers. Fixing»
Math lesson
in 3rd grade
Subject:
“Oral addition and subtraction of three-digit numbers. Fastening»
Compiled and carried out by:
general education teacher
schools I-III steps No.
14
Melitopol Alyokhina V. A.
2018
Topic : “Oral addition and subtraction of three-digit numbers. Fixing»
Goal : — to develop the calculation skills of oral addition and subtraction of three-digit numbers within 1000;
— learn to solve problems of different types;
— perform operations with named numbers;
— find the perimeter of the figures;
— develop attention, memory, logical thinking, correct mathematical speech;
— develop interest in mathematics through a didactic game;
— to cultivate discipline, perseverance, independence, the ability to work in pairs and in a small group.
Equipment : notebook, pencil case, computer, video projector, screen, self-control sheet cards, presentation.
— Good morning, bright sun,
Everyone and everything beautiful!
Let’s all say hello to our guests, smile at each other and take our jobs. Each of you has traffic lights on the table. They will help you. If you are at a loss or something is not clear to you, raise the traffic light and I will come to the rescue.
We bring to your attention a fragment of a math lesson in grade 3. Open our lesson. (slide number 1) Lesson topic: “Oral addition and subtraction of three-digit numbers. Consolidation.» Our task: to prepare for the test work, so let’s set ourselves the following goals (children, open the next slide) : (slide number 2) repeat the methods of oral addition and subtraction within 1000; perform operations with named numbers; solve problems of different types; find the perimeter of shapes; develop attention, intelligence and logical thinking.
(next slide) (slide #3)
We will overcome the paths to mathematics without hesitation!
Let’s do a mental count with Little Red Riding Hood and the Gray Wolf. Let’s help Little Red Riding Hood solve the examples to defeat the Wolf (Enter the game.) We move along the arrow and select the multiplication table for the number 5. (all the examples in turn, we will complete the work with the house. “Thank you for your attention!”) Well done! Done with the task! Close the game. Now let’s remember how to add and subtract three-digit numbers correctly. (When adding three-digit numbers, hundreds are added to hundreds, tens to tens, ones to ones. When subtracting three-digit numbers, hundreds are subtracted from hundreds, tens from tens, ones from units.) Let’s consolidate our knowledge. Let’s move on to the next slide. (slide #4)
The lesson «Reinforcing» makes us understand
What do we know and what do we need to know.
Here we are waiting for the game «Gift for the Dragon». Log in to the game. Drakosha himself will show us the way. My young friend ! On New Year’s Eve Drakosha found gifts. In one of the boxes, a Snowman hid from Baba Yaga. Help Drakosha find out what box he is in. But be careful! Baba Yaga on the alert! (take turns solving examples with comments) Thank you! Help! Click the Quit Game icon Go to the next slide. (slide number 5) Pinocchio applauds you with me. Bravo! Let’s get away from the computer.
You can’t spend hours at the computer.
This is very dangerous for the eyes!
So that everything is in order with the eyes,
We need to exercise for the eyes.
Eyes up-down, up-down, right-left, right-left, move the eyes clockwise, counterclockwise, clockwise, counterclockwise, looked at the tip of the nose, straight ahead, again at the tip of the nose, straight ahead, close your eyes for a while.
Open.
Eyes see everything around
I will circle them.
Eyes can see everything —
Where is the window, and where is the cinema.
I will circle them
I look at the world around.
Take jobs.
There are many interesting things in life
But while unknown to us,
Let’s think and count
And learn a lot!
Let’s move on to the next slide and turn to the erudite page «From the History of Numbers». (slide number 6) The time machine will help us look into the past. So, go!
|
||
To write, for example, 9, it was necessary to squeeze out this tick on a clay tablet 9 times. This icon meant 10. The number 11 looked like this: . Can you imagine how much space it took to write only 29?!
Close the page. Move on to the next slide.
(slide number 7)
The workout is over
Math help!
We have come to a very important stage of work in the lesson: the final test on the topic «Oral addition and subtraction of three-digit numbers.» You have a self-control sheet on your desk. Take it. When completing the test tasks, do not forget to enter your chosen answer options in the appropriate cells.
Move on to the next slide.
(slide number 8) Together with this cheerful Mickey Mouse I wish you success! Get to work. (slides #9 — 20)
After finishing the work, check your answers and compare them with the correct ones. (slide number 21) Now count the number of correct answers and evaluate your own knowledge on this topic. Raise the yellow smiley for those children who received a high score, and the blue one for those who did not know the answers to all questions. Let’s move on to the next slide. (slide #22)
You are all great today! Let’s evaluate our lesson on the «Five Finger Method»: (slide number 23)
- М (little finger) — thought process.
What knowledge and experience did you gain today?
-
B (nameless) — target proximity.
What did I do today and what did I achieve?
- С (medium) — service, help.
How did I help today, how did I please the teacher, classmates?
- U (index) — cheerfulness, physical form.
What have I done today for my health?
- B (large) — state of mind.
What is my mood?
We helped the characters a lot today. I wish you to be just as kind in life.
Always stay lucky, brave,
Let only fair winds blow!
But the main thing is that whatever you do in life,
Let it be in the name of good!
The next slide brings us a surprise: our favorite game with Niels. (slide #24) Let’s help him get through the fourth story.
