Problem set #9.
I decided to carry on with true/false number sentences, to help the children begin to use mental strategies involving tens, and to help them become comfortable working with symbols.
True or False?
10 + 10 = 5
5 + 5 = 10 + 10
10 + 10 + 10 + 3 = 33
33 = 10 + 3
10 + 10 + 10 + 10 + 10 = 100
22 + 10 = 32
12 + 10 = 10 + 12
10 + 2 = 5 + 5 + 2
2 dimes = 4 nickels
4 dimes = 10 pennies
As Megan Franke has described doing in her own work with elementary students, I wrote these number sentences on index cards so that I could easily shuffle through them as I was working with the children.
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