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### Course: Early math review>Unit 6

Lesson 5: Adding up to four 2-digit numbers

# Adding multiple 2-digit numbers word problems

Sal solve word problems that involve adding multiple two digit numbers by using place value. Created by Sal Khan.

## Want to join the conversation?

• For the 4th shelf, there are only 7 books, and the ten's place has a zero. Is this correct?
• Interesting question. Yes, there is an "invisible zero" for the number of books in the 4th shelf at the ten's place, now written as "07" if you want to visualize the amount as a 2-digit number like the others.

[R]
• if we have 20 tens and 40 ones then how many hundreds are there?
(1 vote)
• Great question! Let's break it down.

20 tens is the same as 20 × 10, which equals 200.

40 ones is just 40.

So, if we add 200 and 40 together, we get 240. There are 2 hundreds in 240, so the answer is 2.