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0:03:54

2.NBT.5 - Making the Next Ten

0:06:37

5.NBT.6 - Using Estimation to Aid in Dividing

0:03:55

3.NBT.2 - Subtraction

0:04:31

3.NBT.2 - Addition

0:05:00

4.NBT.5 - Area Model

0:03:39

4.NBT.6 - Partial Quotient