Grade 2 Math · Level 5, Full Grade-2 application
Addition Within 1,000
Add three-digit numbers using place value and regrouping strategies.
Questions like
- 368 + 257 = ?
How the lesson starts: Addition Within 1,000
Hoot's book delivery
Hi friend! Meet Hoot the owl. Hoot runs a big library. Two boxes of books just arrived! One box has 243 books. The other has 125. How many books in all?
Add place by place
Here is 243 and here is 125. Add each place. Hundreds: 200 + 100 = 300. Tens: 40 + 20 = 60. Ones: 3 + 5 = 8. Put them together: 368 books!
Trade 10 ones
More books! 358 + 127. Hundreds: 300 + 100 = 400. Tens: 50 + 20 = 70. Ones: 8 + 7 = 15. Whoa, 15 ones! That's 1 ten and 5 ones. 400 + 70 + 15 = 485!