When you calculate 12+23, you first compute 2+3=5, then 1+2=3, to find the answer 35. In other words, you perform two single-digit additions. Of course, in cases like 12+29 where there is a carry, it ...

In 1971, German mathematicians Schönhage and Strassen predicted a faster algorithm for multiplying large numbers, but it remained unproven for decades. Mathematicians from Australia and France have ...

Solve two by two and three by two digit multiplication problems including extended response. Scaffolded lesson provides for classroom differentiation. Can be used as a lesson leader, guided practice, ...