Wednesday, April 13, 2011

Double Pennies for a Week or Take a Dollar?

Here's another great extension for a paired reading of the books, One Grain of Rice and The King's Chessboard, two books that explore the concept of doubling.

I asked my son which he would rather have:

1. a penny today that would then double each day for a week.
2. one dollar.

I made a handout for him to record his thought using words, pictures and/or numbers.

Print the handout and try it with your kids. I'd love to know what methods they used to solve the problem.

P.S. After he chose "A", I gave him the $1.27. He eagerly put it in the coin box he made in Sunday School and then put it in the offering at church. His idea. Happy sigh.


  1. ThIs is perfect for young children to grasp the idea of doubling! I will remember this for when K is older. Great ideas!

  2. I'm such a math nerd. I cannot wait until my son is old enough to begin learning these concepts!

    Jamie @ hands on : as we grow

  3. Ooh, I am so doing it when daughter is older. Great doubling lesson that doesn't go too far up to lose younger children.

  4. Terrific idea going to give this a try with my oldest. Love that he gave it to church:)

  5. I love this idea! Am going to try w/ my son.
    What a wonderful heart too!


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