Curated OER
Add and Subtract to Get Four
Explore the many paths to get to four in this addition and subtraction instructional activity! Learners walk through the steps of the options: adding two numbers, adding three numbers, and subtracting two numbers. They examine which...
Varsity Tutors
Varsity Tutors: Aplusmath: Addition Worksheets
Create customized addition worksheets. Choose from basic facts to four-digit by four-digit questions. The size of problem set can be selected, as well as whether the format will be vertical or horizontal. An answer key can also be...