Khan Academy

Adding 1 vs. adding 10 (K-A)

Adding 7 + 6 (K-A)

Adding 8 + 7 (K-A)

Understanding place value when adding ones (K-A)

Understanding place value when adding tens (K-A)

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

Adding 2-digit numbers without regrouping (K-A)

Adding by making a group of 10 (K-A)

Adding within 20 using place value blocks (K-A)

Adding within 20 using ten frames (K-A)

Breaking apart 2-digit addition problems (K-A)

Regrouping to add 1-digit number (K-A)

Subtract within 20 using a number line (K-A)

Subtract within 20 using place value blocks (K-A)

Subtract within 20 using ten frames (K-A)

Subtracting 14 – 6 (K-A)

Missing numbers between 0 and 120 (K-A)

Number grid (K-A)

Intro to place value (K-A)

Place value example: 25 (K-A)

Place value example: 42 (K-A)

Greater than and less than symbols (K-A)

Adding four two digit numbers (K-A)

Adding multiple 2-digit numbers word problems (K-A)

Missing numbers in addition and subtraction (K-A)