“You can add up twelfths to make halves, thirds, or quarters, so the uncia was fairly versatile,” Dr. Math explains. “When they wanted smaller fractions, the Romans usually cut the uncia into smaller ...

In fourth grade, students focus most on using all four operations - addition, subtraction, multiplication, and division - to solve multi-step word problems involving multi-digit numbers. Fourth-grade ...

A fraction is part of a whole. The whole can be a shape, a length, a number or a set of objects. Fractions are always divided into equal parts. A half is one of two equal parts that together make a ...

Converting between fractions, decimals and percentages is a useful problem-solving skill. The data can be more easily ordered by size when written in the same format. Calculations often give a decimal ...