Page_44_Strategies_to_Make_Addition_Easier_Grouping_Addends_Doubles.mp4Page_44_Strategies_to_Make_Addition_Easier_Grouping_Addends_Making_10.mp4 Page_28_Number_Stories_Other_Tools_and_Strategies.mp4 Page_37_Addition_and_Subtraction_Addition_on_a_Number_Line_Find_Sum.mp4 Page_44_Strategies_to_Make_Addition_Easier_Grouping_Addends_Making_10.mp4 Page_80_Adding_Larger_Numbers_Partial_Sums_Addition.mp4 Page_85_Subtracting_Larger_Numbers_Open_Number_Line_Counting_Up.mp4 Page_34_Two_Step_Number_Stories_Drawings_and_Number_Lines.mp4 Page_79_Adding_Larger_Numbers_Ballpark_Estimates_Exact_Answer_Not_Needed.mp4 
