Khan Academy

Comparing fractions of different wholes (K-A)

Creating equivalent fractions (K-A)

Equivalent fractions with visuals (K-A)

Equivalent fraction models (K-A)

Equivalent fraction visually (K-A)

Estimating when adding multi-digit numbers (K-A)

Estimating when subtracting large numbers (K-A)

Representing 1 as a fraction (K-A)

Whole numbers as fractions (K-A)

Cutting shapes into equal parts (K-A)

Identifying unit fractions word problem (K-A)

Intro to fractions (K-A)

Fractions on a number line (K-A)

Fractions on number line widget (K-A)

Rounding to nearest 10 and 100 (K-A)

Rounding to the nearest 10 on the number line (K-A)

Rounding to the nearest 100 on the number line (K-A)

Adding and subtracting on number line (K-A)

Addition using groups of 10 and 100 (K-A)

Breaking apart 3-digit addition problems (K-A)

Adding and subtracting on number line (K-A)

Methods for subtracting 3-digit numbers (K-A)

Subtraction by breaking apart (K-A)

Subtracting 3-digit numbers (regrouping) (K-A)

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