Khan Academy

Subtracting 2-digit numbers without regrouping 1 (K-A)

Subtracting a 1-digit number with regrouping (K-A)

Subtracting two-digit numbers without regrouping (example 2) (K-A)

Counting by 10s (K-A)

Skip-counting by 100s (K-A)

Skip-counting by 5s (K-A)

Adding 53+17 by making a group of 10 (K-A)

Adding by making a group of 10 (K-A)

Addition and subtraction with number lines (K-A)

Strategies for adding 2-digit numbers (K-A)

Subtracting 1 vs. subtracting 10 (K-A)

Subtracting 10s using place value (K-A)

Subtracting 1s using place value (K-A)

Subtracting 2-digit numbers without regrouping 1 (K-A)

Subtracting with regrouping (borrowing) (K-A)

Addition word problem: spots (K-A)

Addition word problem: starfish (K-A)

Subtraction word problem: basketball (K-A)

Adding and subtracting on number line word problems (K-A)

Addition word problem: horses (K-A)

Subtraction word problem: crayons (K-A)

Subtraction word problem: snow (K-A)

Subtraction word problem: tennis balls (K-A)

Creating picture and bar graphs 1 (K-A)

Reading bar graphs: bikes (K-A)