Problem set #5.
First we read a book called Only One, which emphasizes the mathematical big idea of thinking of several things as one thing (examples: 1 dozen is 12 eggs; 1 dime is 10 cents). I asked the children to fill in the blanks:
1 egg carton = ____ eggs
1 dime = ____ cents
1 ____ = ?
1 ____ = ?
Then we solved problems:
1) Emilio had 5 dimes to spend. He bought a _____ that cost 20 cents. How much money did he have left?
2) Sunny had 2 dimes. She wants to buy a ____ that costs 40 cents. How much more money does she need?
3) Dr. E has 70 cents. She spent 52 cents on a chocolate bar. How much money does she have left?
I chose these problems to continue to work on helping the children develop ten as a unit. As you will see, the money context posed some special problems of its own.
Posted in Case Study: Four Second Graders, Problems, Uncategorized | Comments (0)
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