佛州数学老师在电子课件上传的资源，总共12章及复习资料。
1. Addition and Subtraction within 1,000
2. Represent and Interpret Data
3. Understand Multiplication
4.Multiplication Facts and Strategies
5.Use Multiplication Facts
6.Understand Division
7.Division Facts and Strategies
8.Understand Fractions
9.Compare Fractions
10.Time, Length, Liquid Volume, and Mass
11.Perimeter and Area
12.Two-Dimensional Shapes
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