Operations and Algebra < 159 (K-A)

Add and subtract within 20 (K-A)

Add using arrays (K-A)

Addition within 20 (K-A)

Equal sign (K-A)

Relate addition and subtraction (K-A)

Subtraction within 20 (K-A)

Word problems with "more" and "fewer" (K-A)

Word problems within 20 (K-A)