4
1Keywords:
addition
discussion
estimation
Students estimate an addition problem, share their methods, discuss grouping nice numbers, and then do a problem using this method, then design a question showing how it uses the method.
1
1
0
2
2
1
4
13
4
6
2
1
2
4
5
2
3
2
2
8
0
1
0
1
5
