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

### Course: Numbers & Operations - The Real & Complex Number Systems 159-175>Unit 2

Lesson 2: Intro to addition with 2-digit numbers

# Adding within 20 using ten frames

Sal adds 8 + 7 using ten frames. Created by Sal Khan.

## Want to join the conversation?

• excuse me but I have a question, you could also add ten in the 7 box by bringing 3 of the 8 box too right?
• Not exactly,
10+3 is 13. Because 1 box would be filled with 10 and u would need to bring 5 to 8 box instead of 3.
Hope this helps
(1 vote)
• the ten frames were the hint or it is just for helping to get the answer?
• Ten frames are to help you get to the answer. Counting them helps to get the answer when adding. Hoped this helped. :)
• plz answer me are there children in my class and how many
• the answer is 15
• Why do we use ten frame instead of using our fingers that way it’s a lot sensible
• When you use a ten frame on paper or online, people can see how you got your answer even when you and your fingers are busy with something else.
• how come you know so much things?
• he practices a lot
• is the answer 15
• Yeah, the answer is 15, good job! Eventually, things will get harder and harder and they'll start adding letters into equations. Math isn't even fun anymore. :(
(1 vote)
• thank you for putting the frames they help me alot:D