Lesson 1 - Real Numbers | Maths Session - Term 1 | #realnumbers #DPEducation #Grade11Maths

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Lesson 1 - Real Numbers
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1.1 Real Numbers ⏩00:00:00
1.2 Counting Numbers ⏩00:01:00
1.3 Triangular Numbers ⏩00:03:36
1.4 Square Numbers ⏩00:04:47
1.5 Prime Numbers ⏩00:05:43
1.6 Composite Numbers⏩00:06:20
1.7 Integers ⏩00:07:36
1.8 Rational Numbers ⏩00:10:41
1.9 Terminating Decimals ⏩00:14:12
1.10 Recurring Decimals ⏩00:16:22
1.11 Express recurring decimals as fractions ⏩00:22:29
1.11.1 Short method to show that recurring decimals are rational numbers ⏩00:30:21
1.11.2 Identify recurring decimals and terminating decimal⏩00:39:06
1.12 Exercise 1.1 ⏩00:47:57
1.13 Irrational Numbers⏩01:13:44
1.14 Represent a line of length equal to irrational numbers⏩01:16:30
1.15 Reprentation of irrational numbers ⏩01:20:38
1.16 venn diagram to show numbers ⏩01:26:55
1.17 Exercise 1.2 ⏩01:30:54
1.18 Surds ⏩01:34:49
1.18.1 Simplify entire surds⏩01:37:55
1.18.2 Convert surds to entire surds⏩01:46:59
1.18.3 Adding and substracting surds ⏩01:51:55
1.18.4 Multiplication and division of surds ⏩02:06:46
1.18.5 Squaring surds ⏩02:17:13
1.19 Rationalise the denometer ⏩02:19:19
1.20 Example 1 ⏩02:28:54
1.20.1 Example 2 ⏩02:29:40
1.20.2Example 3 ⏩02:30:17
1.20.3Example 4 ⏩02:30:57
1.20.4 Example 5 ⏩02:31:48
1.20.5 Example 6 ⏩02:32:47
1.20.6 Example 7 ⏩02:33:29
1.20.7 Example 8 ⏩02:34:03
1.20.8 Example 9 ⏩02:35:58
1.21 Exercise 1.3 ⏩02:39:11

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The DP education was born out of the passion of Mr. Dhammika Perera to provide an innovative online math learning platform for school students to enhance their math skills. School students can access the government math curriculum from grades 6-13 at their own convenience for free.

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CHAPTER DESCRIPTION (in this video)

This video is a lesson on Real Numbers for Grade -11 Students of the Term -1. By studying this lesson will be able to,
• to investigate number sets
• workout basic mathematical operations regarding surds

Maths can not be learnt if you leave in between the class. So, we have provided break in between our online class at regular intervals.

You can ask your doubts and any questions related to this chapter in the message section below, and our teacher will reply back at the earliest. Also, do attend our live QnA Sessions, which are conducted from time to time, and we post the announcement on our social media platforms.

The link is given below:-

You can also visit Mr. Dhamikka Perera's Youtube channel to know more about his vision on DP Education and the initiative at

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Our Motto is ""Learn what you love"" and we will work hard to make learning enjoyable for you.

[bihangarathnayaka]

I think we should be thankful to Mr.Dammika Perera for this concept because this videos are vey useful for us in this situation

[Tharushi_Premachandra]

I did my O/Ls in 2022 and I got ‘A’ result for mathematics. Actually I didn’t want to go to any tuition class for this subject as your teaching is really good ✨. Thanks a lot ma’am! ❤️🙏🏻

[sashikadasunwickramarachch]

This is very important for us. That's good if we can learn other subjects like this. Thanks for the teaching

[RaviSinghe]

Dear teachr, we are so lucky to have you and you are the best maths techr I have ever found, hats off to your great service on behalf of us

[Realeye]

Excellent, excellent, I knew about this while I was listening to mr . Dammika on 360 derana program where he exposed about this YouTube program and I really wanted to find out, so I see it as a great task to many people who want to learn
In English. Great

[eayt]

Thank you for helping us to study during this pandemic period 😥😊

[miznamizna]

Miss ure teaching is great. I really love to watch ure videos bcz it's so much interesting to me. I'm really glad to have a such a kindful teacher who teaches us in youtube. Thank u so much.😇😇. I'm new to grade 11. I hope these videos will help to come forward. I'm a student who is very interested in maths.🤗🤗

[safnanimashi]

Great work by Mr, Dhammika Perera...But most students who is following English medium Advnaced Level Bio Science stream would be really benefited by this channel if You can start doing videos of the syllabus as well. Because there are very limited resources for us

[diseniehemachandra]

Really understandable and highly appreciate your hard and great work! Thank u so much <3

[rehanranasinghe]

Firstly I Thank to Sir Dhammika for doing this great work for students..
Secondly I thank to the teachers who are giving there precious time for us and there hard
Thank you so much Teachers and Sir

[fathimarisana]

This is very helpful to me
Thanks a lot

[thinkaboutitt]

Impressive!! hats off came here to study my missed lesson but now iam thinking of learning the whole thing under you

[sanidhsalman]

Simply great, i dont understand online classes that well, but i understand the DP education teaching very well, thnx for everyone whose are working hard to upload these videos😍😍

[thayathayathaya]

Thank you so much teacher.These are very useful to every students. Once again Thank you teacher. Love you so so much teacher. May God bless you

[nadundilshan]

Science subject ekath puluwanam godak hondai

[isuriwageesha]

teacher, your teaching is very interesting and excellent

[lasithdamsara]

This is an opportunity to schooling students. I can undestand very clearly.
Lesson are clearly explained by the teachers.
Thank you
Mr. Dammika Perera and the teachers who gave fullest cooperation to this task.

[mhdafsalprofessional]

Wooh! Grt Explanation miss. I could understand very well, hats off to you♥️

[fathimanaushana]

Nice way of teaching I love this very much

[mhdazhar]

So useful madam.. now i am not following any tutions.. just only see this.. so useful.. thank you maam... god bless u..