3.NBT.2

Breaking Apart 3-digit numbers Khan Academy (3:41)

Break Apart Strategy to Add (6:31)

Place Value to Add with Model (4:59)

Using Place Value to Add NO Regrouping (8:58)

Number Rock Subtraction wtih Regrouping SONG (1:53)

Break Apart Strategy to Add (3:33)

Khan Academy Adding 3-digit Numbers w/Regrouping (3:03)

Using place value to add by Khan Academy (2:25)

Estimating when subtracting Khan Academy (3:06)

3 digit subtraction with model (5:06)