Multiplication is calculating the sum of groups of the same size. There are lots of ways to build and describe multiplication problems. Using repeated addition, you can add equal groups together, one ...

Susan Hobart asked this week’s “question-of-the-week": What strategies help math facts stick besides the old “drill the skill” and, if someone is not proficient at addition facts, can learning ...

A long-standing puzzle seems to constrain how addition and multiplication relate to each other. A graduate student has gone further than anyone else in establishing the connection. In 1983 the ...