Mathematicians soon hypothesized that as your set gets bigger, the biggest sum-free subsets will get much larger than N /3.

Add any fraction instantly using this fast math trick ...

We compared the effects of different ... the fractions contain fat, ash, moisture and lactose. The main difference between the fractions was the content of lactose, which was adjusted by adding ...

Another common struggle: the parts-of-a-whole problem. Fractions are introduced through the “pizza model,” but students’ ...