DK Publishing
Mentally Adding and Subtracting
If you're looking for basic practice problems for youngsters learning addition and subtraction skills, look no further! Scholars solve 30 equations by filling in a missing addend, subtrahend, or minuend in these horizontally-aligned...
Pennsylvania Department of Education
Links Away: Looking Back and Moving Forward
Students explore fact families. In this math lesson, students use links to model a fact family. Students solve addition and subtraction problems.