Khan Academy Videos for Addition

• Adding 2-digit numbers (a)

• Adding 2-digit numbers (b)

• Regrouping when adding 1-digit number

• Adding with Regrouping

• Using place value to add 3-digit numbers: part 1

• Using place value to add 3-digit numbers: part 2

• Adding 3-digit numbers (with regrouping)

Khan Academy Videos for Subtraction

• Subtracting two-digit numbers (a)

• Subtracting 2-digit numbers (b)

• Subtracting with regrouping

• Subtracting 3-digit numbers (regrouping)

• Subtracting 3-digit numbers (regrouping twice)

• Subtracting 3-digit numbers (regrouping from 0)