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## Numbers & Operations - The Real & Complex Number Systems 159-175

### Unit 2: Lesson 2

Intro to addition with 2-digit numbers- Adding within 20 using place value blocks
- Adding within 20 using ten frames
- Add within 20 visually
- Add within 20
- Adding 2-digit numbers without regrouping 1
- Adding 2-digit numbers without regrouping
- Breaking apart 2-digit addition problems
- Break apart 2-digit addition problems
- Regrouping to add 1-digit number
- Adding by making a group of 10
- Regroup when adding 1-digit numbers

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# Adding within 20 using place value blocks

Sal adds 8 + 6 using place value blocks. Created by Sal Khan.

## Want to join the conversation?

- Can I add within 40?(3 votes)
- Yes, you can add within 40 with similar place value blocks.(3 votes)

- how do i eaven do this i am comfused for some reson and i like your vids for lerning(3 votes)
- Watch it closely and ask you teacher(1 vote)

- what is 177+345(2 votes)
- The answer to your question is 522.(3 votes)

- hihihihihihihihihihihihihihihiihihihihihihihihihihhihiihihihihihihihihihihiihihihihihihihihihihihihihihihihihihihiihihihiihihihihiihihihihihihiihihihihihihihihihihii(2 votes)
- ihihihihiihghiigihfioirijpoojrjwrojeoierojirejwjwrejwejroerjerjpprwoewrre(2 votes)

- What if you don't know your multiples?(2 votes)
- How about add within 30?(2 votes)
- Whats 1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000×55566778900099998771122345667889000987665443221+12234567890877665443×0(2 votes)
- it = 0[I think because any thing times 0 = 0(1 vote)

- im just going in the chat to pass the time of the video(2 votes)
- i am actual in grade 8th(2 votes)

## Video transcript

- [Instructor] What we
wanna do in this video is think about what is
equal to eight plus six, and to help us out, we have eight blocks
shown right over here, and we have another six blocks
shown in this pink color. So pause this video and see
if you could figure it out. So there's a lot of ways to approach it, but one way that I like to do it is, let me see if I can make a group of 10 out of some of these blocks and then see how many
of them are left over. So if I want to make a group of 10, I would use all of these eight. So one, two, three, four, five, six, seven, eight, and
then I would need two more and I could get those two
more from this six here, and then I would have one,
two, three, four left over. And to see what that looks like, you can see that we could
take all of the eight and then two of the six
to make a group of 10, and so I set that up as a whole bar. So we know that our answer
is going to have one 10. So this tells us that that is, let me write it this way, one 10 and then how many ones? Well, we could see that right over here. We have four ones left over. So that is four ones. So if we think about place value, that's one 10 and four ones or 14. We have 10 and another four,
which is the same thing as 14.