Part+Part+Whole+-+Part+Unknown

=**Part Part Whole - Part Unknown**=

//Question// Connie has 13 marbles. Five are red, and the rest are blue. How many blue marbles does Connie have?

__**Direct Modeling**__ OOOOOOOOOOOOO OOOOO ﻿OOOOOOOO

13 - 5 = ?

Strategy: Counting from 8 blue marbles!

media type="file" key="Direct Modeling.mov" width="300" height="300"

__**Modeling**__ // OOOOO // // OOOOOOOOOOOOO // // OOOOO ﻿OOOOOOOO //

//5 + ? = 13//

//Strategy: Join to// //8 blue marbles!// // ﻿ // media type="file" key="Modeling.mov"

//__**Counting**__// //13 - OOOOO // //13 - 5 = ?// Strategy: Countdown from media type="file" key="Counting Down.mov"

//5 + OOOOOOOO // // ﻿5 + ? = 13 // Strategy: Counting on to media type="file" key="Counting UP.mov"

//__**Facts**__// //13 - 5 = ?// Fact known: 3 + 2 = 5// 13 - 3 --> 10 - 2 --> 8 13 - OOO ﻿--> 10 - OO --> ﻿8