2+2 = ???

Actually, I know you know the answer, but I want to know how you got it. This year we are going to take part in an awesome new math program (new books and everything)! I was taking a look at some of our ideas from the first investigation (which is like a chapter, but doesn’t the word “investigation” sound cool???) and the content focuses on students explaining their answers.

I really like the idea of students explaining their answers because when I was in 5th grade, I ‘m not sure that I could. As a result, I want to see how people think about a typical addition problem.  Please let me know how you solve the following:

2,345 + 487

This is what I think:

2,345 + 487 =

2,345 + 400 = 2,745

2,745 + 80 =  2,825

2,825 + 7 = 2,832

I like to break 487 down into easier parts to manage. I look at 487 as 400+80+7. From there it is easier to add those numbers to 2,345. In order to understand this problem in this way, it is important to realize place value. In other words, 487 has 4 hundreds (400), 8 tens (80) and 7 ones (7). What do you think about this explanation? Would you do this problem this way?

5 Responses to 2+2 = ???

  1. Paul says:

    I Googled it. 😉

  2. Mr. Fowler says:

    Hey Paul!
    Thanks for stopping by. You mean to tell me that you wasted a search on that? I only have one thing to say to that…YELLOW! Oh wait, I can’t do that anymore. Back to the drawing board.

  3. Spencer says:

    Hey, Mr. Fowler it’s spence i wish we could have had new books last year but, i gotta go. see ya

  4. Mr. Fowler says:

    Hey Spence!
    Good to hear from you. Yeah… the new stuff will be nice, but I don’t know if we will be able to do the Operation Shuffle this year. So, I guess you were lucky. Stop by when school starts.
    Mr. Fowler

  5. Marshall C. says:

    I think that I very much agree w/ your mathmatical process. I also think that it hleps me to understand what I’m doing if I have to eplain my way of thinking.

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