posted by mark .
write addition vertically.decide which new groups you will make.then add to see if you are correct.
a new ten?________
a new hundred?___________
a new thousand?_________
i need answer and explain how
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I'm not sure what you are asking, but here is my best try.
In the tens column you have 2, in the hundreds column you have 5, and in the thousands column you have 1. Which are new?
I hope this helps. If not, repost with more details. Thanks for asking.