Mental Math - add, subtract, and compare numbers
Common Core Connection for Grades 1 and 2
Understand the meaning of the equal sign.
Determine if equations involving are true or false.
Add and subtract within 20.
Add within 100, including adding a two-digit number and a one-digit number.
Fluently add and subtract within 20 using mental strategies.
Compare two two-digit numbers using the comparison symbols.