Addition, subtraction, and estimation videos

Rounding to the nearest 10 on the number line

Rounding to nearest 10 and 100

Rounding to the nearest 100 on the number line

Estimating when adding multi-digit numbers

Breaking apart 3-digit addition problems

Addition using groups of 10 and 100

Adding and subtracting on number line

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

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

Adding 3-digit numbers

Estimating when subtracting large numbers

Adding and subtracting on number line

Subtraction by breaking apart

Methods for subtracting 3-digit numbers

Subtracting 3-digit numbers (regrouping)

Worked example: Subtracting 3-digit numbers (regrouping)

Worked example: Subtracting 3-digit numbers (regrouping twice)

Worked example: Subtracting 3-digit numbers (regrouping from 0)

Missing number for 3-digit addition within 1000

Missing number for 3-digit subtraction within 1000

Three digit addition word problems

Three digit subtraction word problems